No one knows about the NEW 3D billing system

My Husband Canceled my cellphone contract on the 27th Nov and asked for my number for be changed to prepaid.The shop assistant said this is allowed we just had to put a note on the cancellation form.Keeping in mind the contract would expire by end Dec so we know there is a debt outstanding but were also not informed we could pay it up front on the day. The following sat I tried to make a call and was told to recharge my account. I did this with R110 airtime. To date I am not able to receive any incoming calls to a number I use for work as well. After many calls to Vodacom customer care - I was told my number was deleted, then told it is not found on the system,does not exist - yet i have had the number for the last 15 years, then told it is pending, then told again to reactivate the number as it was deleted. We have been forwarded to every department in Customer care . Finally somebody said it is being migrated to 3D billing and somebody would call us from the department. To date nobody has called us. After 15 years I am disappointed that Customer service is not well informed and not really interested in me using my cell phone as intended.