Cash Crusaders - False advertising

Went to cash crusaders at President Hyper square near Vanderbijlpark to purchase a car radio. After selecting the radio (R379), the store assistant got the radio checked to see if it is working. After this I went to pay. This was my first time buying from this store and I had to update my details on the system. After this was done, the cashier said R400. I told him that the pricing on the rack clearly states R379 and I actually showed him. His reply..."maybe they haven't updated the system or the price tags because the price is R400". I told him that this is false advertising and that he need to consult his supervisor about this. He made it very clear that he can (and will) do NOTHING about it. I asked my money back and told him that I will not buy from this store again. He turned his back on me and walked away. PATHETIC!!!!!!