We feel cheated!

In December 2019 we upgraded our daughter's (a student) contract with Vodacom online. She was promised 10GB data as well as a R250-accessory voucher which made up part of her upgrade. Her phone was delivered promptly. We spoke to Joseph on 19 December about the 10GB and the voucher. He explained that she would receive the data and the voucher on 1 January 2020. She indeed received her 10GB data. She has however not received her R250-voucher despite numerous phone calls and e-mails to Vodacom. We have ticket numbers and we have reference numbers, but up to now Vodacom has not delivered and we feel rather cheated. We wanted to use the voucher to buy a tempered glass screen cover to protect her phone. In the end we had to buy a screen cover from our own pockets. How difficult is it to give someone their voucher that they are entitled to? I am so disappointed. When you phone Vodacom you have to hang on for ages. When a consultant eventually answers, you get transferred to another department. No Vodacom, no! You're supposed to be a leader in the telecommunication industry, so this is not the kind of service I expect.