Missing Vodacom Voucher

I took out a RED VIP contract with Vodacom in March and the start date was 1 April. The contract came with R7500 voucher. I was told that I will need to allow for two successful installments before I can use the voucher. Indeed, on the 28th of April, I received the PIN and the link for the voucher. I checked the link and could receive the OTP at that stage. Fast forward May 2023, I could no longer access the voucher because the OTP was being directed to another number that I do not know. I immediately contacted Vodacom on *** and I spoke to a lady named Nomathembu who informed me that she will log a fault and get me a voucher for Woolworths as per my agreement. This was after she had explained to me that it would take too long to correct the OTP receiving number A week went by and there was no voucher. I contacted the same number and got a lady named Boiseka who confirmed that she can see Im due to receive a Woolworths voucher on the 2nd or on the 5th. I have not received anything. Im not sure now if I was being ****med into taking an expensive Red VIP contract by Vodacom. There is no communication, from Vodacom at this stage.