Multiple charges for one order

I ordered food by them on the 2nd of October for R545.50 and they charged me twice for the same order. The first payment went off at 18:53 and the next one went off at 21:15. They told me on the APP that it’s an authorisation hold but i did speak to my bank and they said the money went through twice. There is no phone number of them that works where someone can help you, it’s permanently unavailable. I am speaking to them on the APP but nobody has come back to me to say when I can expect my money back. This is ****************.