POUR MANAGEMENT 3 weeks and no refund

I received a quote to fix my phone at we-fix which I paid over R4000 for 29th June. I was then told the screen would take 3 weeks to be delivered so I filled out a refund form and took it to Samsung (3 days to fix). I have been calling and emailing for 3 weeks and have still not received my refund. I have been into the store. I have emailed head office. I was told it would definitely be refunded last week Wednesday (11 July). It is now the 17th July and I continue to phone back and forth, to be told once again that they will be in touch when the refund is processed. This is a lot of money and I am struggling without it. NO MANAGEMENT - DISGUSTING - What do I do from here??????!!