Bad Customer Service

All of this happened at Monte Casino in Wimpy I was with my 4 kids , when we arrived we were welcomed with a smile from the waitress whom I dont have her name as she was not wearing her name tag , okay then another family of 4 entered Wimpy it was a lady with a gentleman and two kids , firstly the waitress gave us the menu then went to the other family did the same , okay she took the other family order first then came to us , bear in mind I was there first with my 4 kids , Okay I let that slide what was worse the other family order came first and we waited for about 20-30 minutes to recieve our order , I let that slide still , what got me was there fact that the other family complained not sure for what but the two managers rushed to the other families rescue I asked for the bill which came after a while I had to stand up and go to the managers straight on and shout about the service which I dont like doing so infront of my kids, instead of the waitress to apologise she just laughed at me even worse the manager did not take what I was saying to account , what I dont understand is the fact that we all pay the same type of money even though the amount is not the same though a rand is a rand , why do people at such facilities never know how to treat customers