I was lied to by customer service and I'm now told there's nothing that can be done to fix the issue

I reached out to Xfinity on 1/22/25 over chat to see if they had any promotions available, otherwise I was going to switch over to Verizon as they had a really good deal. The rep offered me a weird deal where if I opened an Xfinity Mobile line, dropped my landline, I could keep the same channel lineup and internet for $162.64/mo. I asked if they could take the mobile phone out because I didn't need it, but the rep insisted that if I didn't open the new Mobile line, I would not be eligible for the promotion. The rep also said the phone was free and the monthly cost of the phone was bundled in the $162 monthly charge. Again, I didn't need the phone, but the bill would be almost $100 less a month, so I told them to go ahead. The rep was sending me things to sign off electronically. The numbers were not making sense and I kept bringing that up, but the rep insisted that the reason they were incorrect was because they needed to remove the cost of the landline, after that the price would drop to the $162 they were quoting me. Same thing with the phone -- they insisted there would be a one-time activation fee of $10+ and then no additional charges. Well, it was all total [Edited: "Language"]. 

Bill just for TV/Internet this month was for $300+. AND I'm being charged extra for the mobile line on a different credit card. Called Xfinity, and the rep flat out said she had no idea what promotion the previous rep had been talking about and the cheapest she could make my monthly bill was about $270, and that wouldn't include the $30/month I'm now being charged for a phone I didn't want in the first place! And to top it off, the previous rep had never removed the landline and I was still being billed for it. 

So I went from trying to save money to paying more all because some Xfinity rep LIED. Now I have to deal with shipping the phone I never wanted back to xfinity, having to call them again to terminate that idiotic mobile contract. I saved the transcript from the chat and informed the rep over the phone that I had proof of what was promised, but she said there was nothing she or her manager could do. So, after I'm done dealing with the Mobile line, I'm switching over to Verizon, who can offer me the same service I have at xfinity for less, something I should have done back in January.