Edgars zero customer service

I would give no stars if I could, but 1 star is the minimum! I purchased a pair of jeans on the Edgars website, however the jeans were too small. So I went to the Edgars branch at Cresta shopping centre to change the jeans for a size bigger. There was no stock of the size I wanted and I didn't want anything else so I asked for my money back. I was told that because I purchased online, there is no "receipt number" that they can punch into the computer system in store in order to give me a refund. I asked to speak to the manager - who turned out not to be there so I spoke to another supervisor who told me the same thing. The lady then proceeded to put the jeans into my bag, gave it to me and said "I'm sorry but I can't help you". I find this absolutely appalling and I want my money back. I have emailed ***, *** and *** twice now and have received no response! Since Edgars has been taken over by Retailability, the service is shocking! I even contacted the CEO to get someone to help me! Still no-one has contacted me! I went on to Facebook to see if I could somehow get help from someone there, and what do I see? Hundreds of people complaining about the lack of customer service....so it seems to be quite normal for the new Edgars...no customer service! I want my money back please!!