Not loving it

On Tuesday 17 November we got McDonald's (Bela - Bela). Extra sauce--- it did not look like they have it stock as it come in a lid coved with a lid but that was fine. The big problem was my Coke Zero (no ice) that was more a mix between chemicals and lemon soap taste. Something clearly when wrong... we also had a normal coke but it was fine. We stay 28km out side town so I did not feel like driving back.