Refund!

I bought a part (fan belt) from Renault Clearwater branch and I was sold a wrong one. I returned it and was told that refund will be processed in 3 working days. I called them on the 22/07/2019 which was a 4th day, Christian told me that I should give them a day. I phoned again on the 23th (5th day) i was told the same thing and he said I should ask for Alfred when I call again, I just called in earlier today and spoke to Alfred, he told me that no one told him about a refund, my documents are just laying there on the table, that is private docs (ID and Bank statement). Alfred told me he will call me back shortly, it is now over 2 hours and I am still waiting. I am not happy with the service, when I came to the store, they were clearly advised which belt to give me but they still gave me a wrong one. This is the worst service experience ever!