Woolworths Spoilt Food Cover Up

I purchased a sandwich from the Greenvalley Woolworths in December, An Avo chicken and sriracha. I got excessively ill post consuming that sandwich. I sent an email to the Customer Services and I got an email which is the biggest coverup for their lack of quality. They then choose to further insult me by giving me a R150 voucher. Dear Woolworths, I spend in excess of R10000 every month in your stores, please just be honest and upfront. Your food was of substandard quality and had caused me the worst case of Food Poisoning! Shocking!