ID THEFT - WELKOM BRANCH VODACOM

So i have logged into the "My Vodacom App" and noticed a number that i do not recognize. I the called the customer care line 135 - the consultant was very helpful - he then continued to inform me that this number was opened on 21/12/2018 - IN WELKOM - i live in Witbank. I have never in my life been to Welkom.

So now i ask you HOW does the branch in Welkom authorize a new contract WITH MY CREDENTIALS without MY SIGNATURE ?!?! JUST HOW??????

I AM FUMING!!! Now i have to get an affidavit and certified id copy and all of those stuff that i just have lying around..... and submit it to the ***** department. Why should i be the responsible person to sort out the mess when i didn't cause the mess? May the consultant who helped that ********** person open another account on MY NAME get a huge cramp where the sun doesn't shine for messing up my Festive season - YOU SUCK