They refuse to give me my refund

I ordered a jacket online and everything went well, they even sent confirmation email. Almost a week later I get a call to say the item is out of stock and they will refund me the money. That call was made on the 6th of April and I still have not received my money. When I called to ask what's happening I was told someone would call me but they never did. DONT BUY FROM THEM, THEIR CUSTOMER SERVICE IS TERRIBLE!