Disgusting Service from Mr D

Absolutely putrid service. I mistakenly placed an order on the app, I say mistakenly because I used the incorrect card to place the order. I called in 2 mins later to the customer service centre as I was having an issue canceling on the app. They advised they cannot cancel the order as it has already been prepared. I find that impossible because it was literally 2 mins later, I ordered 4 full meals. No way on earth it could have taken less than 2 mins to prepare 4 meals. When I check on the app it showed the order was still been prepared by the restaurant and it will only arrive in 45mins. I did advise the agent I'd like to cancel the order and will reorder using my correct card. The customer services agent spoke to was extremely rude and put me on hold for 20 mins when I had asked to speak to a manager. After holding for so long she comes back on the line and says that she's transferring me to the manager and then hangs up. Never ever tried to call back. When the food eventually did arrive 2 meals I paid for was missing. The 2 meals that we did receive was extremely dry and not appetizing or appealing in any way. Yet the full amount was still deducted. Absolutely terrible service from MrD and its restaurant partners!