Be careful when you change your adress comcast will rip you off!!!!

I was payin 144.52 monthly for internet,tv phone line with 2 year contract. When I did a adress change my bill jumped all the sudden to 159$ with 3 years contract. It was my fault that  I did not go through the contract but you dont do  the same mistake all the sudden my contract is 3 years instead 2. Thank you comcast