Vodacom *****

My data contract expired and i did not renew. I called vodacom to enquire what was going on and the answer was i am behind on billing. I paid an early cancellation fee and thought the matter was over. i am now handed over to a collection agency called VVM. I have sent proof to vodacom and VVM that the matter was settled however i am still being rated by the credit agencies as having missed payments. i have been trying to fix this for 9 months now !