See me no more at your store

The worst store experience ever. The service I received is enough for me to stop buying KFC all in all. The time that I wasted waiting for my order when they know very well they are busy debating amongst themselves. I ordered the Twister Black Friday special x 2 which is buy one get one free so in total I was supposed to get 4 Twisters and 3 Very Berry Krushers. When placing my order I added 2 twisters to my cart as the special says “buy one, get one free” so I bought 2 knowing I’ll get the other 2 free. I waited more than 30 minutes in the store with no resolution. When I asked for my refund, i received a response with an attitude “you’ll get your refund where you ordered - online” in sepedi. Absolutely atrocious service for a store I supported so much!!! Even if there was a system error, it shouldn’t be my problem!!!