Unsatisfactory response to complaint about possibly contaminated food

10 of my friends and I had lunch at Sun International’s Bayside Pantry on the 24 April 2022 to celebrate our being in Matric in 1962 ie 60 years ago. That night 4 of our party Including myself had upset tummies. We could only put it down to something we had eaten for lunch at the Bayside Pantry. When I reported it the Mr. Patrick Carty he said that they have samples of the menu tested but later said that they had not done so because it was not possible because of the holiday. He offered me a free meal for 6 of the party with the proviso that I sign a disclaimer. I did not because I regarded it as sweeping under the carpet what had happened. In other words he did not accept responsibility for the incident and said that as far as they were concerned I had not accepted their offer and as far as they were concerned that the end of the story. I would have expected a reimbur*****t and an apology but none was forthcoming.