Terrible customer service from Supervisor at Boston Spar Bellville.

I had the most horrible experience at Boston Spar in Bellville by a Supervisor named Laurencia. For a supervisor, her customer service was disgusting and down right rude. I really don't know what example is she to the staff, when she is the one training the same staff. This lady made me chase after her and did not speak or answered me, until I asked for someone higher in charge, who was the boss. I was totally put off by the service of the Supervisor Laurencia, who I told to really work on her customer service. I really don't know how is she training new people with her attitude with customers. Please help me on how to deal with this matter Hellopeter?