Horrible Service

I had the most horrible experience at the Senhor Calistos at Mkntecasino, I purchased a Hyperli Voucher for the Restaurant and I used it on the 13th Of February 2021. I went to the restaurant and as soon as I told the lady taking my order at the counter that I am using my Hyperli voucher her attitude towards me changed, She spoke to me in a rude manner and refused to answer me when I asked her questions about the menu. I eventually had my order taken which I used a voucher for and paid seperately for three other meals. The food came and the first thing I noticed was that the burgers had tons of mayonnaise on it which I am allergic to and I asked them to exclude mayonnaise on all the burgers. They refused to change my meals We never ate the food we left it right there and went to buy food at the KFC next door. I was very disappointed with the service that I received I feel like I was discriminated against, I lost money and I will never be going there again.