Vodacom are ****** and *********** network

I am not happy with the service I get from vodacom, firstly I have taken a second contract with vodacom of the no + ********** 7718 , I was so amazed because I always receive unknown numbers and even the ones that are saved show as unknown up until today when I call im told that for all contracts it is not activated , for you to see incoming calls you have to request and is an extra charge, this is Greek to me, why my other contract it was activated without my permission. I just need answers on this one because if you say it's not automatically activated , why it was activated then without my consent.

Secondly on my other contract ********** 172 my data for example 1 gig doesnt last me even a week and it amazes me because most of the time im using wifi and my mobile data is normally switched off. I have uncapped data in my house and my phone is not set to update apps or anything under mobile data is wifi only. Where is my data going to because I don't use mobile data often?