Pick n Pay Strand Street sold me food that is off and didn't even bother to apologise

I bought Lasagne at Pick n Pay Stand street cooked food Delhi for lunch to my surprise when I took the first bite it tasted off then I take another one to make sure and it was definitely off so I walk back to return and I am appalled at what transpired next it turns out I'm not the only one there to return all the people who bought it were returning it. Then they tell me to wait for the supervisor no one is acknowledging they did wrong or apologise for the inconvenience let along the fact that they could have given us food poisoning and this unprofessional supervisor has the audacity to weigh the food again to make me pay for the two bites I took and not give me the full amount I paid no one apologised when I asked for the manager they just called her to void the payment at this point I got irritated should I still get sick from the bites I took because Pick n Pay its too cheap to sell us fresh food Im going to hold them responsible.