Unheard of in a bar in Montreal, one of the bar wa...

Unheard of in a bar in Montreal, one of the bar waitresses made me wait more than 20 minutes to serve me when there was no lineup at the bar. She was drinking shots quiet behind the bar. At the end of 20 min I manage to make my order and finally serve me my 4 drinks but she is wrong and she dares not give me change. Enough upset I ask her to give me change and I told her that she will not have a tip because of the deplorable quality of service and she dares to threaten to fire me from the bar and she dared to claim a tip during more than 5 minutes.
Tips are not a consideration but should reflect the quality of service.
I STRONGLY ADVISE THIS BAR .....