Bad Service - From Supervisor and Staff

On the 24th February 2020 @09:40PM, we (Me and my two brothers)went to KFC Drive-Thru in Hammanskraal Kudube 1st person who was assisting us was Jeanet I greeted her so nicely but she didn't respond and didn't even look at me but I just bought and said thank you then moved to collection, when we got to collection Lerato was serving orders so she told us to wait because they were busy cooking Zinger wings I asked her how long it will take she said she will tell me, we waited from 09:40PM until 10:20PM Lerato changed shift Johanna came in, next thing Boitshoko was assisting after her it was Pretty but none of them bothered to ask us why we are waiting instead they were chatting, laughing, mopping and cleaning in a group - after we allowed so many cars to pass we decided to approach them instead of them helping us they were shifting blames amongst each other, we asked them to speak to their manager/Supervisor since no one wanted to take responsibility and nobody knew anything we now wanted our refund as clearly nobody was willing to serve us let alone tell us how long we were still going to wait but the manager/supervisor called Veronica refused to come speak to us and refund us. We waited for like another 5min the cook came wanting to take responsibility and asked us to wait another 2min of which we didn't see fit if the Supervisor refused to come out - Lerato was still maintaining her statement that she didn't know when they will be done cooking the wings. So we left KFC without our food and money as Boitshoko also said she can't refund us because the Supervisor doesn't want to come out of the office and she was afraid of having a shortage. Its so sad that there was so much drama inside the restaurant while the Supervisor chilled in her office refusing to come out. Is this the new "quality service" KFC is offering us? We are still holding on to the Slip.