Fed Up and Dissapointed by Voacom!

I am utterly dissapointed in Vodacom, I have a contract with them. On the contract I have 3 numbers. One of the contrats ended in Feb 2018. I called in Novemebr 2017 , December 2017 , January 2018, February 2018 to request fr the cancellation of the number ********** 999, that the contract be cancelled and the number returned to prepaid on the 28.02.2018. All the consulatsnts I spoke to in January and February 2018 assured me tht the cancellation has been put through and the aforesaid number will be cancelled upon completion of contract. To my suprise the contract was never cancelled. Lynton, who is the scondary user of this number in question, bought dat on the phone on the 02.03.2018 he realised the 1GB data was used up within a very short space of time , then called vodacom prepaid customer service. He was told that they couldnt help him because he wasnt the primary account holder. On the 05.03.2018 I called the cancellations deprt to enquire about the missing data and why the number was still showing to be under my account whe I clearly requested that it be cancelled. The lady I spoke to said I must hold, she will transfer to another department so they can give clarity about the missing dat. When I asked her about the number still being on my contract, without authenticating me, she confirmed that it was still under contract but she cant help me and she transferred me to another department. There I spoke to a gentleman wh confirmed that the number was still under contract, and gave me clarity about the missing data. He confirmed that he saw the note that was made where I called and requested for the cancellation, I asked him then why is not cancelled. He said he doesnt know and he needs to transfer me back to cancellations. I told him I had initially called the cancellations department and I was transferred to him for assistance. He told me that he could not assist me any further and had to transfer me, mind you the call has now lasted for +- 20 minutes. He then transffered back to the cancellations dpt, the lady I who took me call also confirmed that she could see the cancellation instruction on system, so I asked her then why is still on contract and not prepaid as I had requested and had been promised. She kept asking me to hold and eventually she disconnected the call on my ear. Its a week and half later, I thought I would receive a courtesy call from Vodacom, NOTHING! The number is still refecting on my account and today I received an invoice and I have a bill for the same number. I really am fed up with Vodacom, I am going to cancel even the other two numbers at this rate, I am not finding joy with their customer service really, If i have a concern I always get sent from pillar to post and eventually give up, but this is now the last straw!