Vodacom vouchers not working at NetFlorist

NetFlorist along with Vodacom has this summer promotion running where Vodacom gives out vouchers to purchase items on Netflorist. This is the second time now I received a voucher from Vodacom for Netflorist but the voucher codes do not work. Why run such promotions when your systems are not in place. This is the second R200 voucher that is not working at all. Thought this would have been a nice spoil toward my birthday, but clearly not.