Double payment on food order

First time we used Ubereats was on 12/6/2021. We ordered from Golden Nugget Spur Bloemfontein. We used a voucher for payment but the app show cash payment. We called the Spur to cancel the order who could not do it. The order was delivered very late and the food was also cold. I paid R300 cash but later saw that the transaction was also deducted on the voucher. Basically paid double. Problem here is that you cannot get through to customer care and no local contact number is available to report this. I want it to be investigate to determine if this was a system fault that can be rectified or did the person who done the delivery stole that money Please dont use this app as it vould not be trusted.