********** addition of a new line and NO RESPONSE from Vodacom!

When I checked my balances on my accounts I noticed that a new line was added without my knowledge and consent. I immediately reported this and locked the line. This line had a bill of already R10 700 in just one week! I had to sent an affidavid and copy of my ID to the ***** and Risk department. It's been 5 days already and NO repsonse from the ***** department. I have tried phoning but no one answers the phone or reply to my emails. How am I suppose to sort this out? I don't even know if they are working on my case! And Vodacom will be deducting this amount from my account. I surely cannot afford this amount. How did anyone get access to my details to add another line and where is my signed consent? After being a loyal customer for 16 years, this is how I get treated? Maybe it's time to switch to another service provider!