If you're not sure as to whether you owe money on the THD/CBSD account, get the account verified by sending a verification letter to your creditor. If you don't owe the bill and it is listed on your credit report, co-ordinate with the credit bureaus and ask them to remove the inaccurate information.
However, if you actually owe money on the account, you should settle the THD/CBSD account along with your other credit card bills. Enroll in a South Dakota debt settlement program and let a negotiator work with your creditors to have your outstanding balance reduced.