I'm still shocked

I received a belated birthday gift about 2 weeks ago to be precise it was a JX slim fit jacket a combination of cotton and **** leather in black a size M. Normally I do take a M but the jacket felt a bit tight so I decided to take my jacket back to the Tygervalley Branch seeing that it was the closest one to me without PROOF OF PURCHASE as mentioned earlier it was a gift so it would be obvious that I would not be in possession of any document that showed the authenticity of the item at hand to swop for a bigger size. I went to the customer service desk to tell them my story and the lady that assisted me said that I can go get me a bigger size. The lady went to the back office myself and some other customers waited for 15 minutes before anyone assisted us. Then this Credit Manager named Aqeelah came out and told me that the item cannot be swapped for a bigger size because the jacket looked liked its been worn. I think the reason why she did not want to exchange my item was because of a price difference. The price tag on the jackets they sold was R549 and according to the one bought in Cape Town's branch my friend paid R499. Rest my case