Disgusted and angry

So disappointed in the service I received today at McDonald's Strydom Park firstly I commended them on the new technology that's in the store little did I know I am going to wait 20min for my order I then got up and asked to speak to the manager and a guy by the name of Given{shift manager} rudely came and said no you cannot refund this because it was done by the new machine not asking what the issue is or how he van resolve it no I then demanded a refund which I did get in the end but the moral of the story is be professional and treat your customers right because without customers Mr Given won't have a job