Nothing except keep calling them. There is nothing in law that would force a lender to lend you money, or open a line for you. Once you completely pay off the card, wait and see what they do. They may close the account, or leave it open inactive, or let you activate it again. If you have the option of leaving it open and unused, and showing you paid in full, that will eventually help your score. Don't close the account unless they force you to. Can you pay it off any faster?