Extremely Disrespectfull Customer Service ever!!!!

I have just witnessed a bad and disrespectful service at BP Trio (Alberton, South Africa) Rivett-Carnett Street, Kliprivier Dr, Alberton, 1930.

The Cashiers were changing counters and the lady did not even bother to tell the old man that was in from of me in the Queue. while the man tried to say what he wanted to buy the lady just said "we are waiting for a machine". okay fine we wait. the old man decide to leave seeing that its taking long okay its me on the front. the lady gain say "we are waiting for a machine." okay I wait. mind you its around 6:10 am. instead of keeping us the clients informed that the process might take a few minutes the ladies were laughing. fine another guy comes after me since i was the only one. then he started complaining aswell seeing that they were taking long. the lady said to us over the Glass "Why are you complaining because we told you we are waiting for a machine??" She went on further to say we come with R100 Notes in the morning yet we want them to hurry they are selling petrol not change" Is that how customers should be treated if they are not kept informed about what is happening? i doubt i will ever use that garage again and will never recommend to anyone I want to know if that what BP Customer service are treated. i want this matter to be handled seriously and will post another review of of how this was handled my day is ruined !!!