Contract taken out on my name without me knowing about it!!!

A new cellphone contract was taken out on my name by who knows..... I phoned VC 9 times without any response back. Every time they say they see it is logged with the ***** department, but in almost 4 months nothing has been done to rectify this and re - imburse the money that is going off on debit order totalling to almost 5k. After holding the line and being transfered from the one to the other I managed to speak to someone in the ***** department. Just to hear that they know nothing about my case???????? They also promised to phone me back, but know one did. I send all the documents and avidavid they requested and tbey aknowleded receiving it at the call centre. I am a VC client for 10 years and with 4 current contracts that I never missed a payment on...... *** IS GOING ON VODACOM???!!! As a result I can't upgrade 1 of my current contracts due to "the ***** case pending on my name" I cant't stop the debit order as all contracts are linked on one account. I am registered with the voice password. HOW DOES A STRANGER MANAGE TO TAKE OUT A NEW CONTRACT OVER THE PHONE???!!! WHEN WILL YOU WAKE UP???!!!