No refund from Adidas

I bought a running/training shoe online in Jan 2024 and when they arrived i made sure to inspect and see if they were suitable or not. I found that they didn't offer the kind of support I required for my jogging. I logged a return and they arranged for a collection. Since January 2024 I've been waiting for my refund. I was given the run around that they couldn't pay fund into my bank account so I changed and gave the my discovery bank account which they still complained about. Eventually Adidas was quiet. When I followed up I think in May / June they said they had refunded me but I didn't have the funds in my account. Thus far I have called and emailed discovery bank who claim that they have not received funds. A couple of months ago I went back to Adidas to follow up on my refund and was told that they paid me in May 2024, I told them again that I don't have the funds refunded, discovery bank has said they can only see a payment to Adidas no refund from Adidas. I've asked for proof of payment and discovery bank told me that they don't recognize what I sent them as proof of payment. I'm now stuck because none of these companies are interested in talking to one another, Adidas is not bothered that I'm out of pocket by a whole R1033 of my hard earned cash. They are very quick to close a query regardless of resolution as long as it's not messing up their stats I suppose. The worst service and *******.