You can wait a few weeks and try again or you can wait until the account goes to a collection agency. (debtsettlement.com)
If and when your debt goes to a collection agency, you may start to receive calls about your credit card bill, sometimes even multiple times a day. (effectify.com)
I have a confirmation that the bill was paid, but for some reason the bill went to a collection agency. (asklizweston.com)