Inactive simcard and NO SERVICE

I phoned MTN to cancel my contract and add the number to prepaid REF ********** 99 and in Nov i have sent an email to cancel the contract. On 12 Dec 2017 my number was inactive - i have phoned customer care (keep in mind that my tel number in inactive and now i have to PHONE customer service).

I finally got hold of customer service and they only say that they have received my email and now my number no longer exists - no record of me REF ********** 99, so i ask them to please re activate my tel number.

The operator told me that he will ask his supervisor to phone me - i am still waiting for him to phone me back (gave another number as my number is still in active)

I again sent numerous emails to re activate my number - i received a response saying that they are busy with my request and still i have no number!@

The service is very bad, no one can get hold of me as i have no service

Please HELP!!!!!!!!!!!!!!!!!!!