not honest with advertising

I started a contract with Vodacom on February 13, 2019. The lady that helped me was very helpful and I got my contract up and running. for 2 weeks now all numbers phoning me showed as Unknown even thou I have the numbers on my phone. I phoned the call center and was told I have to pay for my numbers to be revealed. REALY???!!!! I was never once told or on the advertising of the contract that I will have to pay extra to have the basic function on knowing who is phoning me. NOT one of my other contracts had this problem. Vodacom is infuriating and is doing false advertising. just to make you take there product and then telling you 'oh no you need to pay us more' what a bunch of *****.