Refund paid into closed account, how can I get it paid out again?

I have submitted my tax return a few weeks ago, but unfortunately did not update my banking details and refund went into the closed account. I've since updated my banking details at the SARS offices, but when I've contacted the call centre, I was told there's a stop on the refund, that I have to go back to the offices to lift the stop. I have done that, I would like know, how long does the whole process normally takes?

It would take up to 21 days after that to make the refund into your proper account.