Unsatisfactory Service and non delivery

I upgraded my voice contract on 29 November 2021 at Vodaworld in Midrand and received a Samsung Galaxy Z flip, Samsung Watch, earpods and was promised a R1000 takelot voucher will be e-mailed to me as they had run out off stock of the R1000 accessory vouchers as advertised. A week later I called the RED Vip line to query when I would receive the voucher as I had not received. I was advised that they could not assist and I need to call the Vodaworld store. I called the Vodaworld store and advised that they needed to speak to Marketing who were on leave and will be in contact with me after 04 Jan 2022 to resolve. I did not receive a call and have been regularly calling the Vodaword store with no luck. over the past 3 weeks I have been dealing with Everlyn, who promises to call me back but fails to. On Friday, 04 March I spoke to her twice and she promiced that she will chat to her Exec and get back to me before she leave, however no response. I have been a loyal customer to Vodacom over a number off years although Mtn have cheaper offering. Please could Vodacom resolve this smatter