Disgusting attitude from Supervisor

I walked in to a Vodacom shop to make inquiries about something. I was immediately assisted by Felicity. I asked her for what I was looking for but she didn't know how to help me and she approached her Supervisor by the name of Bernice. When Felicity politely asked Bernice what I was looking for, I was shocked by her (Bernice) response!!! She looked at her with a frowned face and shouted "what the f*ck do you want me to do?!!". Poor Felicity tried to still maintain a level of professionalism in our presence but you could tell she was traumatized. That on its on shows how she treats her staff and not to mention that attitude and swearing in the presence of customers. The shop was packed with customers and I overheard a couple that was next to me saying because of her (Bernice) race she can do that to poor Felicity and get away with it. I'm very much disturbed with what I witnessed and I urge Vodacom to deal with this matter accordingly. That is totally unacceptable, Bernice doesn't deserve to be anything in the co-operate world more so to be called a Supervisor. I applauded Felicity for keeping it together and still managed to smile after she was stripped of her dignity in the presence of customers who all heard loud and clear. I'm so disgusted