Refund still outstanding despite numerous efforts

Purchased a couch from their centurion branch beginning of the year. Took it back in march just before the lockdown for repairs as the foam inside has already become soft and uncomfortable. After lockdown we started enquiring about the progress of our couches. No staff member could give us a clear answer as to where the couches are or how far along the repair process is, or when we can expect to have them back. In the light of this information, we were offered a choice between waiting for repairs, considering a new set, or a refund. We opted for a refund, as the quality of the product is obviously sub standard if repairs are needed after only 2 months of use. The fact that no one could give us a clear answer as to the progress or even location of our couches was also worrysome. After the agreement on a refund was reached, I have had to follow up from my side numerous times, each time getting the same answer - that it should be paid within 7 days. To date it has been approximately 6 weeks of following up, getting the same answer, and nothing happening.