Doesn't Checkers care about KZN?

I was at Checkers Raslouw to purchase 25 Kg of powdered milk to send to a Pinetown church for distribution. The manager chased me out calling me a "***** dealer". While i can understand that there are there are people inflating, It's easy for me to proof that I am purchasing in good faith and for honest purposes. This manager wouldn't listen or give me opportunity to show him the contrary. This 25 kg would have made part of a shipment of more than 15 tons of donations.