Airtime advance by **********

My number was hacked by ********** on Sunday the 17th of January pretending to be Vodacom consultants. I immediately informed Vodacom and I asked that my number be blocked which I was told was blocked.

After resolving issue and getting my number back I realized that R134 worth of Airtime advance was done on my number and I am noe told that I am liable for it. I do not understand how because my number was blocked.