BBVA Compass Credit Card Complaint

BBVA Compass Credit card department,

Closing/Cancelling account California

I called BBVA Compass Credit Card services to pay my credit card to - and close my account. They informed me that they do not know how much I owe, and they can not calculate the accrued interest for me to pay it off. I was confused and asked how do I pay off my account and close my card, they said you can do that by phone. I said, I am on the phone, what do I need to pay this off? He continued to state he can not calculate the interest for me to pay the card completely to -. So now I have a credit card I can not close nor pay off? Please Please help, I am poor and unemployed and this is scary situation that I have a Credit card that I can not pay off due to a company that gives me the run around.