Terrible service

I have visited your branch at Cavendish and was assisted by Candy. I found an item that i was interested in and fit it on. I then asked the sales assistant if she can she can check if another branch has it, I then found another item and the manican had a size small on I asked Candy if I can fit it on she told me no she can't remove the item from the manican and the manican can't wear a large, she then questioned me and asked why do I want a small it won't fit because the other garment did not fit me, I felt humiliated, she then checked at another branch for my size I was standing far away from her wAiting on her to come back to me she called from the tills, how unprofessional is that, as a brand ambassador she gives cotton on a bad name. She then tells me I am going to wait long because someone just phoned your store now and they need assistance, my question is do you only have 1 phone in your store?her colleague suggested she take my number check if canal walk has stock and call me back. She gives me the number and tells me I can call them and check or I can just drive through and fetch it. I was appauled and could not believe what she had told me, I asked her to take my details and call the store to check if they have it and call me back with an update, she said she will funny thing is she never took my number I asked her can you please take my number, she still haven't contacted me back and the store closing time is at 7. I am a regular shopper at cotton Canal Walk and your staff are always friendly and very helpfully, I won't be going back to Cavendish after such a terrible experiance