Money tranfered 4 times out of my Vodacom account.

My phone was hacked in Feb and again in March. Somebody transferred R200 on two phones on my contract. It happened twice in a month's time. R800<br> All together. The day it happened in Feb I phone Vodacom to report it. Again in March. Still nothing. It is someone in Vodacom that transferred money. I gave Vodacom all the info and nr every time I phoned. I want my money back. I have 4 contracts with Vodacom. I feel that I trusted Vodacom for more than 16 years now... then without my permission somebody transfer money out of my account... please.. sort this out.