Takealot hasn't refunded credit for out of stock item

I ordered and paid for Christmas gifts through Takealot on 25 November. One of the items was shown as "in stock" on the site. I received an email on 5 December informing me the item was no longer in stock and a credit would be allocated to my account. I have sent 4 emails and phoned Takealot as the credit is not reflecting and I need to place another order. Yesterday when I spoke to a consultant she assured me it would be done asap. It's not 24 hours later and there is still no credit. I have sent another email and once again, not received communication.