I was lied to

I contacted support about a different issue, and during the chat, was told by the agent that he could lower my monthly bill and there would be no change to my channel lineup. It seemed too good to be true and asked a number of times for confirmation that I would not lose any of my channels (even asked specifically about HBO/Max) and was told, "Yes, absolutely right, and with no change in previous service" and "Yes, you will have the same channel lineup". This turned out to be a complete lie because now I don't have HBO/Max, Showtime, TMC, MGM+, Turner Classic Movies, Fuse Music, and a few other channels. I contacted support asking to be put back to where I was before but was told I had a grandfathered package and the changes made could not be reversed. When they tried to put me back to the channel lineup, my monthly charge would have been higher than before!! These are not the terms that I agreed to. I was scammed and want the channels and monthly fee I had prior restored, however that needs to happen.