Hi there...Its david from the hummus boutique.... First I will say that i am realy sorry that you left our place in that feeling....that is not the reason way we opened the hummus boutique.... About the service charge I think that its must be a mistake because we charge only 10% and its should be only 28 bhat....Also this service charge is not must and you pay it only if you realy liked the service...Please feel free to come and take back the 49 bhat any time and also get some nice hummus on the house for your inconvenience.... Also you right and we fix it and now its mentioned on the menu....when you was there we just open and we forgot...all the best dear bro....We love you and will support you any time.