Credit not received within time frame and no response on help email

I ordered an item from Takealot on the 25 Jan and then received a cancellation email on the 7th Feb saying there is no stock. The email stated I was going to be credited the amount with 2 working days. Yesterday I realized that I have not been credited with the amount so I wanted to call and let them know. There is NO number anywhere- only via email. I have sent various emails on their help page and I yet to receive a response!