Ubereats food mark delivered when they are not delivered

I had a bad service experience with Ubereats They owe me my refund,I ordered food that was not delivered and marked as delivered Even after complain they didn't refund me my money I advise people to just use other delivery app that put Customer s need first,I use to see people s comments and ignore but this serve as a warning to someone Ubereats must refund me my money