Issuing of Vodacom R3 500,00 voucher dates **** about

I phoned to cancel a contract. The gentleman was very persuasive regarding keeping the contract and renewing it with a minimal increase in the monthly payment and that I would qualify for a R3500 voucher. I was led to understand that I would receive the voucher the following month, 14 days after payment was received. I received the phone in August 2023. In September 2023, I received an upgrade contract. I then phoned and queried the contract and the voucher and was informed that that I would receive the voucher at the end of September, or the date which I made the first payment for the upgrade. Today, I contacted Vodacom after payment was made. My debit order goes through on the 1st of each month. Now I have been told that the voucher is issued 30 days after the payment is received. To add to my eternal frustration, I am on the old system. Yes, I have been a Vodacom client for many years, and it obviously does not count in your favour. This results in me being put through to various numbers to find someone who can access the old system. Has Vodacom not been able to merge the old and new system yet? Is Vodacom so desperate for business that they lie to get customers to continue with a number with the promise of a voucher in the future, the date which seems to be a moving target?