Vodacom fibre not keeping their promises

Vodacom not keeping their promises. Wanted to cancel my Fibre in February 2023, the lady whom assisted me said that I will receive a R500 takealot voucher. Each month when I call, I'm being promised that I will receive the voucher and I never received anything. This retention strategy is not working and vodacom fibre cancellation department should not lie to their clients. I've been a client with vodacom for more than 25 years and never experienced this unprofessional service.