vodacom contract ********

I took a data contract with Vodacom on March 2016 and ever since then there were more problems than solutions. April this year I cancelled the contract and yesterday when I looked at my credit report I was shocked to see that Vodacom listed me as I owe them with arrears. I then called them today & I was advised that they sent my account to debt collectors. I called Hammond Pole Attorney's & they confirmed that Vodacom handed my account to them and that they gave them the data number to contact me. they also confirmed that Vodacom didn't provide with the records that they tried to call me regarding the account but they just handed over the account. i'm very disappointed as I never received any form of communication about my account status from Vodacom and my details are still the same. I want you to cancel that contract and clear my name on ITC