I have an old debt from a Bank of America credit card. The limit was 500.00 and it became delinquent in 2004. Now they have a collection agency opening a special account with a date claiming that I opened this revolving account in 2007. I, according to them have missed 33 payments. My score is suffering badly from this. They have the original amount as 2,400, not 500. I was wondering what I can possibly do to get this changed. Is it legal for them to open a revolving account without my consent and disguise the date like that?