My cellphone number was canceled without my consent

I clearly requested that my number be changed from contract to pay-as-you-go. And then Vodacom cancelled my number. According to the call center and Vodashop they can't reactivate my number.

This is unacceptable. All my banking things are connected to that number. I can’t even make online payments now, because I can’t receive my one time pin.

And worse of all I lost my phone number that everyone I know contracts me on. I have had this number for 11 years.

All this while I'm abroad and I won’t be back in SA for months. Now I am stranded in a foreign country without a working phone. I can’t make international calls and I can't make online payments. Can't believe this happened. I feel like I want to cry.