Bad service and covid regulation

I went to kfc in hlahatsi mall in katlehong, order my food then step out to go to shops while they were preparing my order. Came back and the gentleman who was giving us our food told us next time we must wait for our and not leave the shop because it covid regulation. I told him that covid regulation requires that he must keep his musk on because he was not wearing his. Asked him that where was no sign saying we must not step out of the Shop but the are signs everywhere saying everyone needs to keep their Musks on. The guy was so rude and we got into an argument about his musk and as I was leaving the store he said we must never come back.