Missing/incorrect items almost every order

It seems like Mr Deliver's service is getting worse and worse by the day. In my last 10 orders, about 8 of them I have had items missing. It is actually more of an inconvenience than they make it out to be when I report the issue. Their excuse is that its the "Restaurant's fault". I understand to a point, but the problem is it happens way to often than it should. Mr Delivery is providing a service to Customers and surely it should be Mr Delivery's responsibility to make sure that the orders are placed correctly, and that ALL the items are delivered. We rely on their service to basically have a meal weather it is breakfast, lunch or supper. When 1 or more of the items are missing to incorrect, that is 1 person in the family's meal spoilt or not even had.

Every time I order with Mr Delivery I wonder, what is going to be missing to incorrect this time??? I have escalated a few times and nothing seems to happen. They are very quick to give you a voucher for the missing/incorrect items, but who then pays for the delivery fee if and when you order that "missing/incorrect" items again? All they say when I advise them of the issue, is that they are "extremely sorry for the bad service", but then the very next order THE EXACT SAME THING HAPPENS AGAIN!!