Bait & Switch at it's Finest

Xfinity are a bunch of LIARS!!!!!!! Been a customer for ATT for over 10 years, had someone recommend Comcast, so they gave me the contact of their person, I talk with this lady, literally show her everything I have with ATT explain my needs, 7 smart tvs, 6 laptops, 6 phones, a PS5, smart home devices etc...  and she was like X plan would be best for you and beat what I was paying ATT and "claimed" that I would have even faster internet for less (under $220). Only for two months later, I'm getting texts that I now have an $80 data overage fee. So of course, I ask what's up and then told well you needed the unlimited data plan (based on your devices and WFH etc). Which after everything comes out to be another $40, so I'm now paying $260... no faster internet than what I had. And I just feel like I was conned into switching and then when it's too late to cancel without an ETF, now here comes the "well you actually need to be on this plan". I have chatted multiple times, talked to on phone (which they tried to sell me cell service),  when all I simply want is a customer service email, because I am tired of the reps in chat and on phone and the lady I signed up with (who has conveniently stopped responding to my numerous emails), I just want to submit my complaints in writing or see if these horrible people can just let me out of my friggin contract without the ETF fee.