Comcast 24 Month Contract a Joke Manitowoc Wisconsin

At the end of 2015, a promotional deal had expired through Comcast, where I was paying $89/month.  My next bill had gone up by over $60, so I called Comcast and I was offered another promotional deal at the same $89/month.  It was a 24 month contract, with a hefty penalty if I cancelled early.  I figured since I have been with Comcast for over 30 years, I didn't see any reason why the 24 month deal wouldn't work for me.  Boy, was I wrong!  My first bill arrived and the $89 deal was now $145.  I had free internet, and HBO, and some other channels I don't watch.  The first year, now ended, I continued to pay the $145.  In October, 2016, my bill had gone up to $171.  I called Comcast who said the promotional deal was only for the first year, and then I guess they can do as they see fit for the second year.  I said no where is it written that the 24 month contract could be changed after one year.  So they said they would find another promotional deal for the same $145 I was paying with free and faster internet included.  I would still have to pay the $171, which I did, and they would have a credit on my next bill for reimbursement.  Just got my bill and it is now $188.  I do not understand how they can get away with this thievery.  I have no idea if this so called "contract" is real since they change the rules on a dime, or if I do indeed cancel, will I get slammed with the hefty early cancellation fee.  Something has to be done.  I think they have their meetings and just laugh at all of us!!