RUDE COLOURED CASHIER

Lastnight at 19:30 we went to Klipfontein Sasol garage to buy water and cooldrink and we were short with R1 and we told the cashier to take back one item so that the money could balance but she told us in a very rude way that there is no manager and there is no one who is going to do that for us. she was very rude and I asked her why is she rude to us then she started shouting telling us that if we are saying the way she speaks is rude then we know nothing. she started swearing and even telling me to go to hell. I responded back also shouting when she started shouting at me and shouted back. I asked the petrol attendants for the managers phone number and they told me they dont have. Its not the first time the cashiers have acted rude to clients. Last time they did that to a lady who was so cross with their service and How are we going to buy from that garage if those cashiers are always rude to us? I hope the manager there calls those ladies into order especially the coloured lady she is too rude to be working with clients. Its so sad cause I always fill up petrol there as i stay in Klipfontein but now i cant go there and lots of people are still going to expeirence such servic