It is your fault completely.

Why didn't you complain. you should have complaint to Consumer Protection Department.

You should have kept that dirty glass with you as a proof.
And why were you not reacting on their rude behavior. If i were you. I will call the police immediately.

I can see this attitude in most of the foreign, especially Asians like me. They accept every stupid situation and don't complain to the authorities.

there is no use to cry over here in QL.

I still cant believe. how did you digest such rude behavior.