Ridiculed by the Store Manager

I visited this store on the 28.07.2015 @ 1230p. As I got in one of the employees, a male told me that if I buy anything in the store I will get 10% discount. I browsed through and as I was I was browsing bumped into an old client/ friend of mine. I'm an interior designer. As we we were chatting I ended up advising her on what cushions to get in the store. 2 sets which I was also interested in buying. We approached a lady called Tabby and asked her to help us. She advised that we would not be getting a 10% discount on the goods or any discount for that matter. I then asked her to check on her system if I as a designer am not entitled to a discount since I think that I might have registered with the company in 2011 when I started my interior design business. she started ridiculing me infront of other clients incl mine saying I am not a designer if I was a designer I should be buying goods for my client instead of advising her on where to go. This meant that she had been listening in on our conversation. She became very rude saying do I think she is stupid. We then decided to leave the store and buy in the Sandton branch. I called the Head Office they promised to call me back today.