Bad Oysters

My family & I had lunch there on Sunday 03 Dec We had the oyster shots and the raw oysters. We all shared this and had different main courses. All of us were sick about 2 hours later (violent vomitting and diarrhoea) When I sent a mail to them on Monday - Gerhard came back and said it could not have been the oysters as we would have only shown symptoms after 24 hours - I corrected him and told him symptoms appear within 24 hours. His response was that their oysters were brought in fresh that morning . However I think they may have been left out for too long. He did not seem too interested and his response was very vague. We will never go back there again.