Vodacom *****ing from their customers every chance they get

I took out a contract with vodacom in September 2017. First they deduct money from my account on 2 separate occasions for the same invoice, and then I have to wait almost two weeks for a refund, even though the problem was on their side. Then I have to find out that I also need to pay vodacom extra money just for me to see who is calling me (If I do not pay the R9.50 every month all my incoming calls will show unknown). I think this is just another clever scheme to ***** from their customers, because with other service providers there isn't such bull**** to pay in order to see who's calling you. This is my first and definitely my last time I'll be using vodacom. Cant deal with this ******* service provider.