Sick of AT&T

I'm 6 months in to my 2 year contract with AT&T and I am already disgusted. why? Why? WHY?! did I ever go back with them? Didn't I learn my lesson the first time??? Why must I make things hard on myself?! For the last four billing cycles, I've had to call and dispute charges of anywhere from $6 to $15. The thing is, I'm not even doing anything. There are random charges that are coming through, showing that I'm accessing the internet at 2 and 4 o'clock in the morning. ?! I'M NOT EVEN AWAKE, PEOPLE!!! It's physically impossible. I ****in' DESPISE AT&T.