Ordered chicken wings and a Texas cheesesteaksandwich and had 2 diet cokes. Left restaurant around 10:30pm was woken with stomach pain and nausea by 5:00am. Suffered from diarrhoea and vomiting until around 6pm the same day. Went back to restaurant for a refund and we were refused and told we had to go and get proof of my illness. The manager treat us with utter contempt and did not seem to believe us, being very pedantic and trying to accuse me of having allergies. Very poor customer service with a distinct lack of honesty.