***** on my account

My account with Vodacom is being compromised , two upgrades were done on two lines, I have informed Vodacom and even spoke to their ***** investigator they have investigated the matter and confirmed, they have removed the billing on one line, the other they expect me to pay, which i refuse, its from March till today, and still they bill me for a hand set i have not received, I emails, made phone calls and send to the ***** investigator, but sill after all my efforts and time they list the phone to my account, It seems they do not want to adhere to even try to understand the fact I will not pay for the handset as i believe someone in Vodacom has given my personal information out for this to happen