extreamly pathetic service

Yesterday at around ten past seven in the afternoon my family and I visited the KFC at the Chatsworth Centre the one on the bottom floor close to Shoprite, I will never in my life make this mistake again I cannot believe how rude and slow staff at this place are. Its like they literally move worst than snails. My husband stood in the queue for half an hour, the place wasn't even that busy also been the second person to be served should've at-least counted for something, but I guess not because KFC decides to employ *********** people who cant even use their own desecration. There were two lines and two cashiers unfortunately the cashier serving in my husbands line was extremely slow especially when there was just one person infront of him and she had already taken his order. She still made him wait an entire half hour how bad is this, I then noticed people started leaving the line behind him and moving to the next cashier which I can understand people were getting annoyed, but that's what ****ed me off to the max I walked from the door to my husband and asked for his card to pay I went to the cashier and politely asked her to ring up my order after she's done with the customer who was also after us, but who had wormed his way first. She rudely told me to get in the line I told her you know I've been standing here for half an hour already and you are serving people before me. Its now already 8 pm I have a small kid with me waiting. it seems she deliberately did this my question is why. Why couldn't she have served me first before dealing with customers that actually came after me irrespective of which line im following and which cashier was suppose to serve me, and what makes it worse she had a bad attitude about it after telling her, all she could've said was I apologise though I am going to serve you now bust she refused .She expected me to back to the end of the line I was so upset this just put me off from ever going back to KFC because if this is how staff is taught and managed its very sad really. I am a manageress in the customer service industry for one of the biggest network companies in the country and I honestly cannot accept this kind of service its unacceptable on every level. I left the restaurant upset and with no meal because of their lack of customer service. Pathetic service coming from KFC staff.