LACK OF ASSISTANCE WITH CANCELLATION

My Telkom mobile contract came to an end on the 9th January 2016, I requested this to be cancelled / transferred to Pre-paid on the 9th. My cancellation form was sent through on the 3rd December 2015 and 23 business days notice was given. To date not a single person from Telkom has contacted me regarding my cancellation, and cancellation has still not happened. I made 4 calls to Telkom to ensure that the cancellation was on track to be finalized on the 9th. 1st Call centre agent told me that someone would definately contact me and I will not be liable for any extra payments as I sent through my documents on time (Monday04/01/16 10:51AM). On Friday 8 Jan no one had still contacted me and i phoned again (08/01/16 15:12 pm) Agent told me that the system shows my cancellation as pending and logged an urgent call for the cancellations/billing department to phone me. On Saturday no one had called and i phoned again 09/01/16 16:00pm. Agent told me that no calls logged on the system and that i do not have a case number, and therefore cannot finalize my cancellation. I forwarded all the information again, STILL NOTHING HAPPENED. Phoned again this morning - NOTHING/NO FEEDBACK/UNACCEPTABLE!!