Unwanted Caller Tune Subscription Service from Vodacom

I keep cancelling the caller tune subscription but somehow keep being added on. I cannot call in as there are no options available, the self-service option does not cater for this as well. I have tried multiple platforms to cancel and prohibit this, including the Vodacom App but still keep getting subscribed to this function. I need vodacom to stop this from happening on my number, and need them to not play these tunes when I receive calls as well.