Vodacom SIM-swap *****

Somebody stole my father's phone on the 28th September at Mohlaba cross Tzaneen. On monday my father went to Vodacom to make a sim swap. The guy who stole my father's phone sends my father an sms saying he can pick up that he has done a sim swap. Ok 4 hours ends and then my father's sim card which he had done a swap now works. The following day, my father's sim card was now blocked. As I am writing this, when I call the number the guy who stole the phone answers it. His threatening my father. He has access to my father's information on the sim card and the phone. A case has been reported to the police and we are still waiting. I have questions for vodacom?

1. How did the guy who stole my father's phone, re-activate the sim card without my father? 2. My knowledge of renewing a sim swap is that before you can renew there is security information. How did he by pass that? 3.