Xfinity agent committed fraud to raise my rate

I have spent all day on the phone trying to figure out why my plan was changed from 1100/300 to 1100/35. I was paying $65 a month. They now told me that I would have to pay $95 for the same thing if I wanted to switch back to 1100/300 (I never signed anything to change my plan, they had no evidence I did). One of them applied a $15 discount on my account, lower my monthly price to $50 (I did not ask for it) but still not reverting my plan and keeping to at 1100/35. 

After talking to 3 agents, I was put to a 4th one who said that I'm paying $50 a month right now. She said she can offer me 2000/300 for an additional $10 based on the pricing she can see. She said she can't get me 1100/300 back but she does see this option so we agreed. We signed the deal ($60 for 2000/300) -- and we have evidence of this deal on our xfinity account and our email. And we saved screenshots/copies of everything. 

Once we made the above change, we did not see our speeds change. We reached out again after a few hours and a new agent (the one that committed fraud) told us that he can offer us $105 a month for 2100/300. When I told him "why would I pay that when I already have 2000/300 for $60", he told us that he did not see us have any plan for this price. This was all done via xfinity chat with an agent so it is all documented. He said that the only way for us to get 2100/300 is to pay $105 per month. We set up a chat to talk to customer service, we were told we can see all our options online as well. Online, it offered us $105 for 1100/300 or $85 for 2100/300. Believing what the agent told us that we did not have the 2000/300 plan for $60, we went ahead and signed up for the $85 price for 2100/300. When we still didn't see the new speeds, we contact supported again, where we learned that our $60 plan was valid and we were "tricked" into taking up the higher priced plan for the exact same thing by the agent. The word "tricked" was used by the supervisor we spoke tl.

She said at this point, we don't have a choice to go back to the lower plan since it is more expensive than our current higher speed plan, and she escalated our issue. We are deeply frustrated with what happened, and having a $60 price being stolen from us because we believed an agent is beyond ridiculous and clearly fraud. I have screenshots, signed documents, chat history, and recordings to prove everything written here. We are going to be reporting this issue and likely preparing to sue.