I’m overcharged 15.50 more for a meal of 74.90

This is the second time I buy at KFC Dobsonville and everytime I feel ******, even regret buying lunch there. I bought All Star Lunch box and I was informed that they only have regular meal, meaning I had to upsize, which I did. I was then told that my cold drink will be a buddy moving the meal of R74.90 that I wanted to buy to R90.40 cents I did not even get the buddy coke that I was charged 3rands for but the cup cold drink, again this is the second time

I basically feel that for the second time I paid R15.50 more but the meal I got is that of R74.90