Unsatisfied Customer

I went to Clicks today 27 September to return a Toni & Guy chopstick curler i bought. I unfortunately did not have the slip but when I bought the item I took a picture of the slip and that is what the cashier told me as the slips fade and that would deem as proof. When I told them they refused to return my item and wanted to give me a voucher and I declined as I paid cash not with a voucher. I asked if they could not check their systems as I am sure you can get a copy of the slip or even my Clicks Clubcard which they just refused to check. I want this item returned and want my money back they cannot refuse me that its not ****** i have bought it.