uttoh2002,
Be informed that, the kind of relationship between you and vodacom as service provider and client is to the effect that, there are terms and conditions needless to say, laws in place governing services as issued by service provider and other authorities this include notifying you with emphasis on crucial aspects related to subscription of your network service as it is their legal duty.
I just do not know, whether a customer gets to choose on how often he should receive alert text or your transaction record worthy of 70 millions gives you such entitlement.
Should you wish to express your grave concern, please go them directly or rather quit the subscription of network as you intend.
A question to you, have you registered your sim biometrically?