Stale food

Bought a chicken at Pedro's wonderpark on Friday night around 21:35 was very disappointed when I arrived home only to find cold fries burned meat and vey dry my lemon and herbs where dry but not only that at around 4 am we started having running stomach the whole house house and I have a 2 year old son who took the meat also. The following day witch it was Saturday we were sick due to running stomach did call them on Sunday I called to explain to the manager she said I must write an email of witch I did with proof of payment and the medication we took I did send them those thing till now they haven't responded. I call again to check if there is any progress on my query. They say the don't have such query and they didn't even receive my mail. I'm very very angry and disappointed as I lost money and got sick from there food and for them not taking the matter serious!