Wimpy refund

I went to Wimpy on the 26th and bought a meal worth R142.00 and paid by debit card. Moments later after having left the restaurant, I realised that they debited R9142.00 instead of R142.00.

I then went back to Wimpy to request a refund of R9000 which was overcharged on me and the manager there said I will get my money back in 2 days time and then swiped my debit card for refund and gave me a receipt.

Today, 31st March 2020, I have not received my refund back. I went to my bank to check, they then confirmed that there is no money pending to be cleared and that Wimpy has banked all the money they swiped on my card.

I am at the moment unable to pay my rent because of Wimpy. The manager seems to have not done the refund. It would have been better they gave me cash so I can be able to cover my monthly obligations.