no service

I entered the restaurant at around 20:10. There was no waitress at the door to show me where I can sit. I chose a table and waited for 15 minutes without being attended to. I could see waitresses coming in and out as they please and still no one came and asked if I have been helped. After 20 minutes I decided to approach a lady at the till and asked her how long should I stay before being given a menu at least. I could not continue sitting and eating after begging for service and I decided to walk out. I don't see my self going to any of there restaurant or encouraging my friend to.