How was a sim swap done without our consent!!!

My fianc? took out a wireless wifi contract. Within a week or 2 5gigs worth of data as finished, we found this very strange. In November there was no signal on the router, I was disconnected. <br> <br> When we enquired with Vodacom it was established that a sim swap was done without his consent??? how the hell is even possible. Our personal information is not secure with Vodacom, how do you allow someone else to benefit from this.<br> <br> I expect the contract to be cancelled with immediate effect and a call back from management<br> <br> I spoke to Lesego Maleka.... no assistance!!!! I asked to speak to a manager, Bryan Bebe..... no assistance<br> <br> Is this how you treat customers that have been clients for more than 10 years!!! <br> <br> I want answers!!!