MADE TO FEEL LIKE AND ILLITERATE AND STUPID

I went to Pick n Pay Carlton Centre to buy food and the was no one to assist me and I decided to go to the terminals and do a cash back, I joined that long queue and when I got the cashier, she told me she can't help because I was in a wrong queue I need the cashback queue outside. I then advised her that I have been in the queue, and I can't go join another queue, she advised me that it was an instruction from management, and I asked her if that was the rule from Pick n Pay head office, she couldn't answer me and called some gentleman who was rude and told me I should ask him politely, imaging asking polite to withdraw my money. I told him i will not ask politely to withdraw my money. He left me there without assisting me and called some lady who also was not helpful and told me there's a big sign outside for cash withdrawal line, she didn't want to listen and just told me what she needed to tell me even if I had been in a queue, it didn't matter to them. I was made to feel like an IDIOT, STUPID AND UNEDUCATED, I WAS MADE TO FEEL LIKE AN ILLITERATE. HAD THEY GONE OUTSIDE TO SEE THAT NOTICE THEY TOLD ABOUT WAS OBSCURED BY THE PEOPLE WHO WAS IN THAT QUEUE, THEY WOULD HAVE TREATED ME DIFFERENTLY.I WAS ALSO TOLD THAT THERE WAS NO MONEY ON THE TILLS , WHILE WE WERE ARGUING THE CASHIER CALLED ANOTHER CUSTOMER WHO HAD R150.00 RANDS TO PAY WITH. I WAS ADVISED TO GO WITHDRAW MONEY AT THE ATM IN NOT SO M,ANY WORDS BY THE LADY.