Unauthorized simcard replacement

I'm experiencing a network issue, as my phone is showing emergency calls only. And for some reason I see an sms that says "We have received a request for a new or replacement SIM card. If you suspect ***** and have not requested this new SIM card, contact Vodacom Customer Care on 082135. Your SIM swap will complete within the next 3 hours"

It has to be stated that I have never requested for any Sim swap or replacement. So, who gave vodacom authorization to process this replacement without my signature and or having my ID document on hand to prove that I'm the one requesting such.

Right now I'm missing important calls because of such and this could be a *****ulent activity happening under my name. I would like for this to be resolved as soon as possible.

The number in question is ***.

I contacted vodacom Twitter page, they asking me for a number to call me on. So I'm expected to go around asking people for their numbers and be around those people God knows till when for me to get a call from vodacom, as if I'm not supposed to go to work.