Impossible to cancel contract

I wrote my cancellation letter, giving one month's notice dated 25 June 2015. My contract was up for renewal on 1 August 2015. I signed the cancellation forms on the same day with my MTN consultant. Forms submitted on 26 June with reference ***, notes made on the account ***. They told me that I can only migrate to prepaid after 31 July 2015. Today, 4 August, I was told that the cancellation was only done on 29 July with reference number *** and I have to wait another 7 to 10 days. They also refused to assist me on 808 as I was standing in front of a consultant, Carla. She phoned again and told me not to say that I am with a consultant because then they refuse to help.<br> <br> This is unacceptable, I will never use MTN again and I will also take all accounts from the Company I work for, away from MTN as we use various prepaid accounts.