Bad Clientelle

I bought a dress for R1500 and explained that I won't be able to come fit it as I stay in a different province however I will send someone for collection since the postage will take time for me to get the dress. I got the dress and it was too big and I called Almondant, I explained to them that the dress is too big but since I wanted it for graduation I wore it. The lady said she remembers me and my story, I must not worry but must come in to the shops for alterations. I explained that I will do it the coming week, indeed I went there when I got there the reception was way too cold towards me and after 5 minutes a shop assistant/tailor came to assist me.I explained my story and he alluded that he remembers me, he then said I must go and put on the dress which I did and he saw that it was extremely big. He then asked if I wouldn't mind for an exchange in the shop to the ones already on the hanger, I told him that I wouldn't mind. He then went to talk t some lady and came back saying they have decided to alter the dress for a fee of R250. I told him that it is rather unfair to make me pay for their own work which I spent R1500 and they should have told me that on the phone when I called a week ago. And he just said sorry we can't help you. I am disappointed when they wanted my money they cared,and now that I have paid they careless ,there is no value for money if I must pay for alterations for their own work.If I had taken it to another tailor it was understandable.Now I had to waste petrol for information they could have told me over the phone and not lure me to their shop just to tell me that.I did not want a refund but for them to adjust the dress.