Buy tickets at Palatine Hill for Colosseum and Forum

I'm in the same boat, interested to hear from other travelers

Answering my own question here with information from another source.

"That option is no longer available (well you can buy tickets at the palatine but will be assigned a set admission time some time later in the day), they've made many changes that make the visit just more complicated for small businesses as well as individual travelers"

If you are the same individual who also posted on T.A. as BklynBorn47, then your cancelled reservation was for June 25th?

Book this:
https://ecm.coopculture.it/index.php?option=com_snapp&view=event&id=E6A1B5B3-BFDA-AC94-6929-0161B2E3A0C0&catalogid=BDB46B8C-0C49-10F2-6036-0167A8502B26&lang=en

It's a 45-minute tour of the colosseum in English and there are still enough open afternoon time slots to accommodate a family of 10. Your tickets will also cover entry to the Forum and Palatine so you could visit them after your tour. This is also a very economical option compared to just about any 3rd-party tour.

Editing to add: if you would be kind enough to provide the link for the quote you'd included above, regarding getting tickets at the Palatine, that would be great to have at hand for others with similar questions. :O)

Yes, I also posted on TA.

We decided against the 45' afternoon option.

We have been to the Colosseum twice and this time the underground tour was what we really wanted.

The quote regarding the Palatine ticket office was in an email from one of the other contacts I have in Rome.

I checked with everybody I knew. LOL

I believe it is accurate since nowhere on any official site is there a reference to the 2 day option.

Oh well, maybe next time.

...this time the underground tour was what we really wanted.

Ah. The underground wasn't specified in your post above, and you did say you'd be happy with just ordinary access tickets so this seemed to be a happy medium.

Even though you mentioned not wanting to visit midday or later, I was working off this from your TA post (I'm not a member but keep occasional tabs on their forums):

"I cannot buy online Colosseum tickets now (all sold out)"
"...it will be so disappointing to tell my grandchildren that they cannot enter the colosseum."
"What are my options?"

It was an option for your grandkids to see it if willing to make that afternoon compromise and needing to order SOME kind of tickets before you leave tomorrow, eh? BTW, if you've been there before, you know that you can see down into the underground from above, right? So all is not completely lost if not being able to land those tours.

If you are still interested at all in getting ordinary-access tickets and are willing to try and obtain them for a morning slot once you are in Italy, you still have these two options; I believe you can do it either online or via the call center:

RESERVATIONS OPENING
CALENDAR OF RESERVATIONS OPENING WITH GRADUAL RELEASE SCHEDULED ENTRANCE TIME COLOSSEUM TICKETS
DAILY OPENING
Every day new tickets for the next day at 3 p.m (italian time).

WEEKLY OPENING
Every Monday new tickets for the following week at 3p.m (italian time).

The 45-minute tours seem to be overlooked by many scrambling for a good, inexpensive way to get inside when other options fail so maybe someone else will find that option useful! :O)

Which tour company cancelled on you?

niekamdt, she said on another post that it was Crown Tours but it doesn't matter which company. A cancellation can occur with any 3rd-party booking if they overbooked, are underbooked, couldn't get their hands on tickets themselves, had a conflict with their guides, etc.

A cancellation happened very recently to these folks who'd booked with one of the most highly recommended tour companies on the Italy forums:

https://community.ricksteves.com/travel-forum/italy/colosseum-tour-cancelled

Cancellations can also happen with 3rd parties + those offered by an attraction itself if unexpected maintenance or safety issues arise, as it did for ALL Panoramic/Belevedere tours (uppermost levels of the Colosseum) back in April. That section was expected to open again at the end of May but is still closed "until a later date". Coopculture (the Colosseum's official ticket/tour source) - is currently not selling that tour and had issued refunds to people who'd been/will be affected.

Thank you for your replies. When I specified "all access" in my original post, I meant we booked underground, arena, and upper levels. Sorry for any confusion.
I didn't remember I had mentioned the tour company in my TA post. We are disappointed but it is likely not their fault. They offered options that we could not take because of other reservations and refunded our money without a problem.
The grandkids (17 - 24) will be fine. They have traveled with us since they were young and understand that stuff happens.

No need at all to be sorry. I'm just happy that your grandkids are real troopers - good for them!!! - and so it's just a wee bump in the road and not a MAJOR disappointment. Whew! 👍 Hope you otherwise have a marvelous trip!