Capitek voucher can not be redeemed

I have received capitek vouchers when i try to redeem it at ATM it had insufficient funds then i tried to redeem it at shoprite they told me voucher already been redeemed i tried calling capitek they gave me invalid info like they told me i have to reset pin and there was no way that i can do that the sender went to the branch they told her that it had been redeemed meaning capitek redeemed it mxm this bank is a ****