Incorrect size sent twice still no credit done

I received a pot lid which was wrong size I returned it and again they delivered the wrong size. I than returned it again and asked to credit my takealot account I got a message to say it was concluded but still no credit showing on my account. I have emailed a few times no response and there is no way to call in. I have no idea how to get this fixed I have been buying from takealot for years. This is the first time I've had issues. Not sure what else I can do.