Paying for Services on Cancelled contract

Cancelling contract with vodacom, October 2018 Ii cancelled my contract after vodacom failed to port my nunber to vodacom existing cotract. The cancellation took 2 months. October when I called I was told it's late for cancellation and the cancellation will happen in November. In November the sim card was converted to prepaid and they took away the data, airtime and everything that was attached to the contract the number was converted to prepaid. Then in November my account was debited which was okay as the consultant said they will refund anything that i did not use. Come Decemeber they still debited my account with no services provided to the sim card, they took their services so I took my money back as I do not have a contract with them at all. Now i keep receiving calls everyday that I owe them, I have been with vodacom over 8 years not once have I missed a payment, now I dont have a contract with them suddenly I missed a payment. should I check my ITC status and found that i'm a non-payer according to vodacom, this will be taken up higher as I do not have contract with them. I demand to see all the script relating to this number ********** 960, kindly email to ********** the script will date back as far as septmber 2018 when the upgrade was done. The contract cannot be callencelled in 06 December where as I have been up and down with Vodacom since October to cancel the contract.