Cease order / cancellation

On the 18 December 2015, an incorrect device was allocated to me. I was informed that a cease order had to be done and cancellation forms had been filled in at the branch. Since then I have been billed for a device that I do not possess. I have been to the brance several times and nothing has been done regarding my query. I have contacted customer services many times too and was told that I have to go into the branch to have this resolved. I have stated this complaint twice on hello Peter and just received courtesy emails, but top date I am paying for a device that I do not possess. I am stressed and highly disgusted in Telkom!!! PLEASE HELP!!!