Unsatisfactory customer service from Mtn

I went to cancel my contract on the 5th of April 2016 which is ending on the 5th of May and on the 7th of April 2016 another phone was added to this contract without my knowledge.Wanted to open a ***** case against a person who added a new phone on my expiring contract without my knowledge,was told at a police station to bring something in black and white from MTN as proof that such crime has been committed.I went to MTN on the 15th of April and I was assisted by Clintia who she told me that she cannot retrieve anything except for the cell number of the new opened contract.I went again on Saturday the 16th and I spoke to the supervisor Gwen who handed me over to service consultant Jama who called the ***** department and was told that I can only get such information after 21 days when ***** department is done investigating the case.Now what upsets me is that am the victim here and if they wanted to get such that info they would have gotten it,they can call the branch where the phone was taken from.Is it that difficult to liase with another branch to obtain such information??