Bad service from KFC Sea Point (CPT)

I placed an order via WhatsApp for collection at the KFC Sea Point (Cape Town), I received a message that the order should be ready by 17h18. I went to the store to pay and collect, at 1st I was told my order is not on the system until I showed one of the ladies order confirmation on my phone. After that it miraculously appeared on the system then I paid for the order. After 5 munites of waiting, I enquired about the status of my order as It should be ready since I ordered online anyway, no one could give me a straight answer. After 15 munites of waiting I enquired again and they kept on saying it's coming with bad attitude. I don't understand why I should wait for over 20 munites since I a placed the order online. Some of the staff at the counter kept on making remarks that I should wait as it's not their fault the staff at the back hasn't prepared my order. After 35 munites of waiting my order was ready, however it was incorrect which added to my frustration. I had a terrible experience and wouldn't recommend this KFC as the staff there has bad attitude towards customers and fail to respond to a simple question of the staus of the order.