Refuse to pay back double payment (fault on their end)

Apparently their card machine is flawed (the new this, because when I complained, I was told it already happened to 15+ other people) and I got charged double.

I contacted them and they said to wait for FNB. It was reported. My issue is that I did not pay FNB and my money isnt in FNB's account. They need to refund me and sort the rest out with FNB.

After a week of no reply, I emailed and got forwarded an email from Johan at Werner Vleismark that was sent to them by FNB, that they are 'busy' with it.

I sent Johan my banking details and explained that they're earning interest from other people's money and it's unacceptable and bad business conduct, but why would he care?

So yeah, I dont care about the products or people.. I have had a horrible experience and am being ignored and what happened, is theft and nothing else.

Business: Werner Vleismark, 95 George St, Strand Email: *** (manager) Phone: ***