Disappointing service structure and customer service ..

My experience with Billy G, was not so pleasant, we made a 5pm reservation for 4, as it was my daughter's 21st... We get to Monte Cassino early and just before 5pm we get to Billy G. The doors was closed , but there were 2 lines (que) outside Billy G. We noticed a line (people standing) at the entrance and we joined that line(que). When the door opened , we started to walk towards the entrance. When we entered we were asked for a wrist band, which we did not have. We was then informed that we must join the other line (que) and get a wrist band from the ladies( employees of Billy G ). I explained to the security that a booking was made and it is my daughter's 21st birthday.. NO one informed us of this and we have been standing in a line ( que) already. We were told to join that line (que) or we can not enter. It is very dissapointing that a Restaurant of this status can not put up proper signs outside to guide their clients ( customers) instead they choose to inconvenience their customers and upset their mood.. This was a special occasion, and unfortunately, the very first moment at Billy G was disappointing... I know Billy G is busy and have many customers... I wonder if they really pay interest in the disappointment of their customers... Billy G should not assume that all their customers are regulars, we used to be regulars, but booked with Billy G after some time... Sad that there is no structure on the outside , and no one even speaks to you while you stand in a line (que) to give you directions or assistance...