Disgusting service

I went to Debonairs Pizza in Lenasia South. I found a very helpful guy who assisted with my order and while he was busy with charging my card came the most rude and disrespectful manager. The card declined and the first thing he said was "shame, you don't have money but you came to buy"? I just ignored him and told the guy to try again, he then said "you ignoring me while I'm trying to help. I told him that is no way to help, first you supposed to greet the customer and then offer to help and guess what he did? Clicked his tongue, I was so angry and I told him to never talk to customers like that. He then asked or what? Because there is nothing I can do.