Arrogant attitude of a staff member at Chamberlains Kyalami

I am building an entire Kitchen and large BIC in a bedroom and need white melamine boards cut. I make most of my hardware purchases from Chamberlains as I find them reasonable and helpful. When I checked pricing I found Builders Warehouse substantially less expensive per board than Chamberlains and they included cutting for free. I decided to approach the person at Chamberlains who handles the board sales and cutting and discuss the huge price differential. I was met with an arrogant attitude and "We only sell Bison boards" if you don't like the price go to Builders Warehouse. No offer to possibly offer a less expensive product for those who want it. Builders here I come.......I will probably purchase much of my other hardware there at the same time!!!!!!!!! What a pity because mostly the staff at chamberlains are very helpful