refund

my name is nthabiseng madikgetla live in lawle ext1 my contact number is ***. i bought a jewellery at american swiss on the 29/12/2015 to find out is silver not gold i returned it to the store i bought it and they told me that they dont have the cash to refund me they will give me the voucher of woolworths, and i explained to them that i dont want a voucher as i paid money i want my money back. they said they can only refund me if the have cash instore. firstly their refund policy says 30 days so what if the 30 days passes and i didnt get my refund whats gonna happen. this is unproffessional and excuses to refund people how can you take cash from the people an d when your suppose to refund them your unable to do so. i want my money back nothing else.