Insulted and humiliated of my color of my skin

Just visited Pick n Pay family store Tokai and was told by the Store Manager Shawn that it's because I'm a coloured that I want to exploit the situation due to I asked why the cooling fans was advertised on the the condola end for R359.00. Then he changed the prices while he was talking to me and saying that they are not robots and changed the price to R999. 00. I do have proof of this.