Absolutely atrocious

Uptil now the service was pleasent, I ordered a mojito and what i recieved was absolutely not a mojito: it was waaay too sour and sweet, it only had 3 mint leaves and a whole cut lemon in it, so i sent it back. The waitress came back and asked me if i was underage, i told her i was 18 so no, and she told me that the bar man said that maybe cause I was underage the drink would be not to my taste, my mother who was with me, argued that even she tasted it and it was disgusting, the waitress then came back a third time with a tired look on her face, as fed up with this as we were and said that they wouldnt accept that, we asked for the manager and the owner came and fought with us saying that he can't lose the money and that we would still have to pay for it. I am utterly disappointed and won't be coming back after this whole ordeal.