Cancdled order

This is for the second time I placed an order, this time I said that I'd go and collect it. On arrival, the franchise said that my order is not appearing on them, when they called mr. D food trying to check what could be a hold up, they said that there was a problem with my order and I'm wondering what could have been the problem meanwhile the transaction went through. I wasn't happy at all because I had to drive back without having my food since well I was running late for work.

All they did was they gave me a voucher saying that I should spend it and I'm not even sure that I still wanna place an order on this expensive app that charges us extra R50 for meals which don't amount to the ones on shops [franchises]. After using that voucher, it will be my last purchase.