At & T direct tv Put me in a 2 year contract without notification Naples Florida

I purchased an additional TV box from ebay. I had at and t or direct TV because they were bought out which i had direct TV for 3 years. I had the card activated. 2 months later I received a notice they were raising their rates. I called to cancel my service and I was told there would be a $450 cancelation fee. I asked why. I was told I had a new 2 year contract because I activated a box which I purchased. I asked to speak to a supervisor which went no where. I will be forced to pay it and fight it later because I don't want it reported on my credit report. I had my father and 2 friends cancel their home and cell service. They are happy now with less bills each month. At & t sucks. So do their customer service