Vodacom's R5000 Kulula Voucher

I upgraded to a new contract in December 2018 and included in my contract was a R5000 Kulula Voucher. I was sent an sms to redeem this voucher and when trying to redeem it, it gives me a message saying "Sorry, this campaign is closed" which can't be true as I was told I have 1 calendar year to redeem this voucher.

Iv been to the store where I took out the new contract, they were unable to assist me and told me I need to phone and speak to the afer sales department as they will be able to assist me. Low and behold, iv spoken to more than 30 different Vodacom operators and nobody is able to assist me. I also phoned Kulula and they said that Vodacom needs to give me a Pin code in order for me to redeem it. Vodacom operators just keep referring me to different departments and nobody knows what's going on or can assist we with this. Extremely frustrating and dissatisfied with Vodacom's service.