UPSET CUSTOMER

On the 15th of December I went shopping at Edgars Somerset mall. Everything went well. I paid using my bank card, transaction went through and I got a notification sms, there apparently was a problem with their system. So I was told they had to swipe my card again and the first amount that went through was going to be reversed into my bank account within 48 hours... 3 days later I still hadn't received my money back so I went to store. Manager I was talking to said I should bring a bank statement showing the transactios, so I did and he said they'd get back to me within 7 days. Waited that out again. Long story short its been almost 3 weeks now and I STILL HAVEN'T BEEN REIMBURSED. Every time I call to find out what's happening I'm given the run around. No one can tell me anything and it's very upsetting. Had I know that I was going to wait such a long time to get my money back I WOULD HAVE NEVER MADE THE PURCHASE...