I presume you arrive at the Como San Giovanni station.
Besides the ferry or the hydrofoil, which however depart from the Ferry pier below near the Como Lago station:
https://maps.app.goo.gl/8Qksjt31LdoUT3Sp8?g_st=ipc
You can also take the bus C30 which departs from the Como San Giovanni station (stop is in front, across the street) but also passes by the Como Lago station. The bus journey is 40+ minutes and costs about 5€ per person (click on C30 to download schedule in PDF)
https://www.asfautolinee.it/find-lines-and-timetables/?lang=en#
More information on the bus service is below. You can download the app DropTicket below to pay by app, but you can also buy tickets on board using card or smartphone contactless.
https://www.asfautolinee.it/?lang=en
200€ is a bit excessive, but given the distance (about 45 minutes) a taxi will be certainly around 130+ euro.