For what's it's worth, I had an issue with MBNA years ago , and they came at me hard. There was an amendment I agreed to called binding arbitration. Due to circumstances at the time, I got in over my head, and was having difficulty paying the minimum balance, so I just decided to quit paying them. It took about 9 months, but I was served with a notice that my account was being taken to binding arbitration, with a place in Minnesota. They awarded MBNA a judgment, and have a law firm based in NC that had lawyers licensed(sp) here in Florida that could enforce the judgement. Fortunately, they settled before enforcing the judgement. So my advice would be to read the terms on your account. If there's nothing in there about binding arbitration, and you don't mind a credit hit, quit paying, if you can't afford it.
Personally, with the enormous interest rate a lot of the cards these days, you can long pay back the amount you borrowed while still owing a ton, so don't get caught up in any moral dilema. They do no due dilligence and extend credit to those whose are a high risk to default, and then cry foul. So F' em. But the realities of credit today are real. There has been some good advice in this thread concerning transfering the balance and a credit service...
Everybody is different, but the only credit card I use today is a debit/credit card. If I don't have the cash in the bank, I don't buy it. Since you are on this site, it's probably not a stretch to assume you gamble. If you are gambling money that you could be using to pay your bills, check yourself.
Good luck.