I booked a room for me and my sister. We got promo...

I booked a room for me and my sister. We got promoted to VIPs. At first we got very excited with the idea and we were very grateful!
We went to have lunch at limoncello restaurant which is supposed to be for the VIP customers and we immediately regretted it. Customer service was horrible! We were completely neglected, nobody never came to refill our water glasses. The staff were very rude and full of attitude. Clearly they were not happy to serve us. The worst thing is that I have ordered a dish which is mentioned in the menu as "gluten free". I also made sure to inform the waiter that I have allergy so he will make sure my order will be prepared with caution. Guess what, I was served a "gluten free" dish with bread on the plate. I had my sister to eat it so she will tell me for sure is normal bread. I called the waiters and the answer I got it that yes it is normal bread. Nobody bothered to make it up to me. Nobody offered me at least something else to eat. All i did is to take the menu and go to the manager to complain. All I got is an apology because apparently the menu was wrong!!. Fair enough at least someone understood somehow my situation. I could end up really sick, had I ve eaten that dish. Thank God I know how to tell if the bread is "real" or not. I Really reeeeally regret I didnt file a lawsuit against the waiter, the chef and the hotel. I have never ever been treated so horribly.