Food Poisoning and Customer Service

Yesterday the 17th September me and two of colleague bought take away food from the above mentioned store ( pap and stew ). I did not sleep the whole night as I had an upset tummy (runny tummy), Today when I came to work I explained to my colleagues about what I went through the whole night and to my surprise the same thing happen to them. The same people I ate the food with had the same symptoms. Today round about 13:00 me and one of the colleagues went to the store to complain about the food and was told the foods department manager was on tea and were not even asked why we need to see them but we were referred to info desk, There we found the store manager whose name I can't remember who explain to us if this was food Poisoning it would normally take 72 hours so it must've been something we had before our lunch making him a doctor of some sort making diagnosis on us. No apology as we had sleepless night going up and down with this awful bug. I was very weak at work yet I asked him if he needs me to go and consult a doctor and bring back results. He tells he was not sure so he needed to call Customer Care to find out and they did not answer so he was going to send them an email so he will come back to me.