Bad Customer Service

Myself and my son decided to purchase some snacks at the BP Pick 'n Pay Express shop on Swartkoppies yesterday evening at 18:00 pm. When I got to the till an African gentleman was paying for his bread and electricity at Till 2. The other Till point 1, was was being used by Penelope to ring up items that fellow employees wanted to purchase. Penelope continued to ignore me and so I waited for the gentleman to finish so that I could pay for my goods at Till 2. The lady at Till 2 (whos name I did not get) then proceeded to do something else and I continued to wait. An African gentleman, with his goods, walked straight up to Penelope's Till 1, she served him immediately without hesitating to ask if she could assist me. I then shouted that this was unacceptable and demanded that I be served first. Only then did the lady at Till 2 that was doing something else decide that she was going to help me. This could be construed as being ****** as they were only assisting African gentlemen.I was left to wait until they felt the need to assist me. I feel that this is utterly disgusting customer service!! I will never use this BP Pick n' Pay express ever again due to such extremely bad attitudes!!