Mcdonalds dowerglen

Visited dowerglen McDonald's on Saturday the 23rd July 2022 , after placing my order the machine lagged for a long time, I was instructed to cancel and try again many times, transaction went through but machine advised transaction had failed, I then processed payment at the till advising the worker that the transaction had indeed went off twice, she advised it will be reversed automatically. I approached the manager to advise him that the bank has not reversed the funds and advised that I need to follow a dispute process. The manager very annoyed at my questions said what must he do as the transaction was supposed to be reversed, he said I must know that this is not the first time it's happened he then suggested that he knows if he gives me my money that I won't bring it back when the transaction is reversed he then proceeded to try and rush me off as he has work to do. When I said I will take it further he then said I must bring my bank statement as their machine is working well and nothing is wrong with it. I then asked him for his details of which he was reluctant to give me. We waited for our food but had missing items from our order which we ordered for our kids, on requesting where is the food items for our kids they said it's coming, we had to wait upto 15 minutes to get our kids food items and it was said that there was a mix up with the order. They are extremely rude and blatant in their disregard of customer service I'm so shocked at the manager, this is crazy in 2022