Being charged to see who is calling

I know nothing will come of this and Vodacom will merely deflect my compliant, but I do not understand how I am being charged R9.50 a month to see who is calling me, it is ridiculous that this is bundled in as a 'value-added service', shouldn't this be part of the standard offering? Oh wait it is, only if you are a prepaid holder, but as a stupid loyal contract holder, every rand is squeezed where possible. Pick someone, any one from your Exec office to call me and try sell me some BS story how Vodacom makes billions, but still needs my R9.50to survive.

I'm waiting.