Terrible customer service

My mother had booked out the titanic room for her 60th birthday. Paid a fortune for catering etc. Darren or something, not sure on his name.. Was such a terrible manager! Rude, unaccommodating and just a massive disinterest on pleasing the client attitude! There was a couple staff members that were the same, but as i noticed, they are just taking the lead from Darren. Setting a bad example for the rest. We had gone up to the top bar and ordered tequila, upon arrival at the upper bar, we sat looking at the one barman for atleast 10 min waiting on service. He then told us they dont have tequila, he then said we can go buy our own and they will just charge a corkage fee. Happy with that we went and bought our own and paid him for the corkage. Couple minutes later darren comes to us and says we must remove it from the premises. After all the effort we went through to attain the bottle to be told rudely to remove it. He then tells us they do have tequila and he will go source it for us. Lone behold, they miraculously now have tequila. What the hell is going on with these people! There were more problems with billing and service, but no space to write on hellopeter. Disgusting service!