While I am sure that this issue has already been dealt with, there are a few things I would like to point out:
1."Allied doesn't sue " I can tell you for certain that if you are talking about Allied International Credit, they do sue. They run a full legal department with a paralegal on staff at all times. They will not sue on small balance accounts.
2. Capital One does have an interest relief program, much like the program with Student Loans, with a few differences. In order to get on board with this program, talk to the collection agent. Tell them that if they agree to freeze the interest (which you know they are capable of doing) you will pay them a 10% downstroke payment and then make monthly payments after this. If $50 is all you can afford then offer them $50 a month after the 10% payment. I know it seems daunthing to make a 10% payment, but it will cease all the interest and fee's on the account.
3. The reason there is still interest accruing on the account is that it is not a "new" or "made up" fee. Your over limit fee's are no longer accumulating, but because you signed a binding contract with Cap1, Allied is allowed to charge the interest. The interest accumulating is a part of the debt owed. There is no law against charging the interest rate as agreed upon by consumer and creditor, only laws against making up fee's or raising the interest rate.
Hope you can get it all worked out!