Discovery Bank is delaying my credit card closure, initiated a new debit order for it instead.

I requested that Discovery Bank close my credit card account on 14 October, I paid the settlement amount they billed on 20 October, two days before it was due. However Discovery Bank has still NOT closed the credit card account. INSTEAD they have initiated a new Debit Order mandate on my transactional account for it. I keep being told the closure is in process. Whereas I was told that it takes up to 8 business days. Meanwhile I have funds that I cannot access from the credit card account due to it being put on a pause for closure. These are my funds that Discovery Bank ought to transfer into my transactional account upon closure of the credit card.