Debit Order Paid Up Account

I paid off my credit card on the 7th May 2018, called Standard Bank arranged for the card to be closed off. I even received a closure letter on the 08th May 2018. On the 25th May 2018, Standard Bank deducts the balance of the paid up credit card, I was told that no debit order will go off on my credit card as it is closed off. I called the contact center today , asking for a refund , I was told they have logged a request the refund will be processed by the 1st June2018. I do not understand why I have wait so long for a refund. I would like my refund to be processed as in like yesterday. I have other debit orders that are going to go off by the 1st June 2018