I need help and I don't know what to do

AT&T doesn't care about customers. I have been trying for MONTHS to change the email address on my account, since they entered it wrong and I can't get into my account to pay my bills. But each time I call and they claim to have changed it, it's still wrong. So I can't get into my account to pay, and they keep racking up the late fees when I've explained the problem and how it's not my fault. Last time I called, they said they'd connect me to someone to fix the problem, and I was on hold for OVER AN HOUR until I finally hung up because they weren't going to come help me. Now I have a bill I can't afford to pay, and they probably won't waive it. I can't handle this, I have too many other things to pay for. How do I get someone to care?