Bate and Switch

My dad asked me for help with the high price he was paying for satellite service with Direct TV.  He is 90 years old and does not have internet service so I told him I would try to find a better deal for him.  I contacted Dishnetwork and the representative told me I could set up service in my name and then just call in and have the account switched into my dads name.  I did everything in a chat and saved the printed chat.  When I called in to make the change they took the info and said it was going to done.  I asked if the monthly bill would remain the same and was told that this was a new contract and the promotion does not apply!  The new price would be about $20 a month more and did not include the other promotions like free HBO etc.  Of course I cancelled to change and now I am contemplating legal action.  I hate it when I am lied to!