I bought a projector on their marketplace, it was faulty

I bought a projector on their marketplace, it was faulty. I logged a return on the 5th of April, had to call them for the item to be collected because noone was saying anything. 22nd April is when a refund was initiated. Apparently it failed when they tried to send the money back. Noone bothered to inform me until I called them and they requested that I send them banking details and ID. Which I did. They promise 7 to 14 working days to process a refund but I'm on 41 days and counting since I logged my return. Zero efforts from them to keep me informed. I want my money. It's outrageous that they always have excuses. The 7 -14 days promise keeps on resetting, I've heard a few people saying they got a refund within a month after logging a return. The promise itself is misleading, it must change from 7 to 14 days to atleast 60 days provided you have the resources to follow up now and then