Bad service

I ordered using the Mr D app, I ordered two meals one with coke zero and the other one I paid extra for a different flavor which was sprite..when the food was delivered, I received two coke zeroes, when I asked the guy who delivered why there's two cokes because I don't drink coke, he said that's what they gave him and he asked if they don't have Fanta or stone they said they only have coke zero..It's not the first time this is happening, the kfc from dobsonville are ****** they never give customers what they ask for..