Blu voucher

Last night 19April 18:20pm I bought a R60 blu voucher at Spar McIntyre. I lost my receipt and went back to them today 20 April..came to the cashier that helped me last night she said she can't get a reprint with the pin number...so I made use of their WhatsApp number even they can't assist me in getting my pin this means now I cant be assisted and loosing a R60..I feel it's unfair that they can't provide proper customer service