Slow online service and no refund of payment

I purchased a Samsung Galaxy S24 Ultra phone cover from the Makro Business website on 17th May 2024. The website states 2-5 Business/working days for delivery. Product shown to be an external Seller: Accessify. After 5 working days of no progress, I contacted Makro via email and call centre and told them to cancel the order as it still showed Zero progress and I had now bought the cover from another far more efficient supplier. They took a few days to reply and said they would "escalate" the matter as it can take up to 10-11 Business days to refund. The order then continued to be processed in the background (even though it was cancelled) and I eventually received it towards the end of May. I have now contacted them numerous times and they've arranged for the product to be picked up (which I should never have let out my sight until I get my refund) but I'm honest and returned it. It is now the 8th June 2024 and I'm still waiting for a refund. Makro I'm reporting you guys to whatever groups I can find as you are an absolute f**** and ****. All I want is my refund now. Stop "escalating" and start performing!!