All Incoming Calls Unknown - Unless You Pay!!

After a year on my new contract, only today they tell me I should pay to see who is calling me. All my in-coming calls always shows unknown, once phoned in and was told I should check my phone settings. Not my primary phone so did not really follow up, today I call and a lady Zanele(very nice lady, professional) told me I have to activate it and they will bill me. This was never told to me in the beginning, I meen who does not want to know who is calling them? Why should you ask them something like that. Off all the things I have heard this year this takes the cake. For a big company like Vodacom to show such stupidity in management is ridiculous. This must be against the Consumer Law. They Are Really Taking Advantage Of Us As Consumers. Funny enough I was told the call centre agents are not allowed to give their surnames to us??? But I have to give and trust them with my ID?