Capital One Credit Card Complaint

Capital One Credit card department,

Payoff process Indiana

I PAID OFF THE CREDIT CARD AND INTREST THE NE-T MO.LATER THEY INSIST I STILL OWE THE SAME INTREST AMOUNT ON A ZERO BALANCE! LANGUAGE BARRIER - VERY BIG PROBLEM.COULDNT MAKE THEM UNDERSTAND! ..HAVE HAD THEM OVER 20 YEARS WANT IT PD! I WILL NOT BE USING THIS CARD AGAIN.AND TOLD THEM ON MY TAPED PHONE CALL I WAS GOING TO SHREAD THIS CARD.THE AMOUNT OF THE CHARGE IS SMALL.ITS THE PRINCIPLE OF IT ALL