Poor service at KFC Ruimsig

Hello,I ordered food at KFC Ruimsig via Mr D, the food included original coke with it,to my surprise they gave me coke with no sugar thought it was a mistake,again yesterday (12-08-20)i ordered the same food but now with a bigger original coke 1,5liter only to be given again the same coke with no sugar, sent it back with the delivery guy from Mr D cos that was not what I had ordered in the first place, got a call from Mr D that they Will call the shop to give me what I had ordered,only for the delivery guy to come back again with the same coke with no sugar and he was told to tell me that these cold drinks they taste the same I must just take it, this is the worse service I have received at KFC.