****** Airtime Vouchers

I just shopped at Shoprite with their free airtime products. The Till Operator rang my products instead of her giving me my voucher afterwards she proceeded to put it away in front of her as if nothing had happened. I proceeded to ask her were my airtime was and she rummaged through the several otger airtime voucher(i suspect looking for mine. With an angry face she then gave me my airtime voucher. Can shoprite sort this out. I wonder how many voucher are being ****** from under peoples noses like this.