unauthorised upgrade

I received an SMS 3am on the 5th of murch that my two contracts were upgraded. I did call the call centre and was advised that my contract was indeed upgraded and the consultant failed to tell me who has upgraded the contract . She said no notes made on the system . She advised me to send copy of satified id and police affidavit and email to her . I have done so and made follow up only to speak to the new consultant who gave me [Email Removed] to email the documents again. I spoke to the credit controller who cancelled my debit order and made it cash. At this point I cannot make calls or load airtime on this contract . I have 2 active contracts with mtn and both upgraded without m knowlege. Its frustrating because I dont get any positive feedback only an automated response that they are still investigating. My initial contracts are expiring on the 23rd of May 2016 and I will not be upgrading this contracts . All I want is cancellation on this 2 upgrades that I did not ask for . I am not happy with the service received from MTN . Callcentre not helping at all and you cannot get hold of the ***** dept of MTN as they are not reachable. Regards Sibongile