Account Blocked for more than a week

On the 9th last week, I received an SMS from RCS apologizing for a technical issue on the self-service app which caused a duplicate payment on my account, incorrectly increasing my available credit. The message also stated that my card would be blocked until the issue is resolved.

I understood the card was blocked, but I did not expect it to be for more than a week. I have been trying to make a payment since tuesday to settle my actual balance, but I get a pop-up message every time saying my account is 'up to date' while showing R0 available credit.

How long is this going to take to resolve? I need my account updated so that I can settle my balance and keep my payments on track