Poor customer service no service at all

We came for lunch 04 Jan 2016, we waited for a menu till I had to call a waitress asked for a menu and a glass of water. We waited for 30min for someone to come a take our order and bring us a glass of water. We left the restaurant without being served. I informed the restaurant manager Moses, who also was one of the people walked pass without asking have we been served. I will never go back or recommend the place to anyone as this was my second bad experience with Grassroof restaurant.