Company in Switzerland to help planning trip in September. Trains Hotels. Places

There are a number of such companies. But this is primarily a do-it-yourself trip planning site for exchanging information. I understand your desire to just let a travel agent handle all the planning.

You might start at mySwitzerland.com.

PS I gave you a suggested itinerary on your other thread. Switzerland is the easiest country in the world to travel by train. They go everywhere and are very frequent, at least 1 per hour in each direction. Get a 6 or 8 day Swiss Travel Pass to make it easy.
www.sbb.ch/en

Hotels are universally very good. Pick one that is convenient and in your price range and you can't go too far wrong. We can help here with suggestions.

Thank you so much