Forced to pay for terrible order

On Friday my mother and I decided to go have breakfast at Wimpy (East Rand Mall) since it's been 3 months and I haven't been out after having my baby. We ordered the drinks which was the Pina Colada crushed ice and we complained that it was bitter and it even caused ulcers for my mom. The waiter did not help in this regard accpet making excuses for the badly made drink and he refused to exchange it and we had to order and pay again for the tea and coldrink, then the waiter had the audecity to put that terrible drink in 3 take away cups which I don't know how we were supposed to carry those around the Mall while shopping and least thinking that we can drink them later instead I paid the bill and left that awful thing on the table That was by far the worse service I have ever had at Wimpy and not happy at all to be forced to pay for something I hardly drank (only had a sip to know it was terribly bitter) then petronised by having it poured in 3 Take away cups. I asked Clement the waiter to call the Manager but the Manager came we ended up just paying the bill to another waiter and left