Jet Norwich Building St George`s mall- worst service ever experienced

Last month I purchsed a dress that was on sale. The lady at counter advised that if the dress doesn`t fit, I can bring it back. The dress was slightly dirty and she recommended that I wash it and it will be all good. I asked her thrice- if the dress does not fit if I could bring it back and she said yes. While she checked the garment, she accidently ********** tag. She just continued to advise me to keep tag with garment incase it doesn`t fit and I can bring it back and they will gladly accept it. Well Murphy`s law, the dress didn`t fit- On Monday when I arrived at the store, they were offline. Then on Tuesday I returned after work, so it was close to 5 o clock. The store wasn`t full, but staff as you know- they are always slow and giving exceptional service is definitely not one of their strong points. The only reason I go to this store because I pass it on my way home and it`s within walking distance from my workplace. When I eventually got to the counter, the girl already looked irritated with me for bringing garment back, she then advised that she is waiting for her supervisor and said that she will assist the next client. I then moved aside, I waited for more than 20 minutes and still no supervisor. I went to look for the supervisor myself and eventually when she came, she shouted over the counter "MAM" probably 3 times and looked very agitated. I remained calm and rather than addressing her arrogance, I kept my posture and proceeded to do what I came to do. I explained everything and the supervisor advised that they are not allowed to take things back that were on sale and also the garment is dirty. I probably told her the story 3 times. The lady who assisted me with the garment when I purchased it was not there. She ended with, she`s going to have to take my word now because the girl that assisted me was not there. Asif I was lying or making everything up. I did not appreciate her tone and her way of speaking. She had an attitude like she is in charge and she is going to put me on my place. Because of this I made a promise to myself, that I will not go to that store ever again. I use to make use of that store on many occasions but not anymore. Jet needs to make sure they send their staff on the necessary training with regards to customer service. remember, I can make use of any store, and Jet`s service is the one thing that differentiates itself from it`s competitors