Vodacom repetative *****

I have been a victim of ***** 3 times now through vodacom... I fail to understand how this is possible.

Surely after the first and second time there should have been some security measure out in place .

To make matters worse each time I tried to call vodacom they were unable to assist me or give me answers or reasons as to how this keeps happening.... and now today I got a email about a quote that was generated somewhere in a vodacom 4u in soweto... can someone please help with this before I lose all faith in this company.