Bad attitude as a manager is bad for business

I am utterly disgusted with the manner in which I was treated in one of your branches at Alexandra. I ordered a lunch pack meal and requested for a thigh and a leg portions as I always order from other branches. The cashier told me that they don't serve the meal in those pieces. I then asked to speak to the manager and the manager (Ivy) refused to come to the front and she was very rude and told me from the kitchen that I must take the order as it is served or go elsewhere or call the head office to complain. I asked for the number and she refused to give it to me and told me that I should look for it at the board. I don't think that this is a right manner that a manager of a franchise should speak to customers. The least she should have done is come to me and explained why they couldn't assist me with my request. I am so disgusted...