Incorrect Listing

I am very disappointed with the Vodacom as all the sudden I’m listed for a contract I cancelled in October 2016. The last statement received was also in the same month, I have never received any emails or calls from the Vodacom stating that an amount is still outstanding. Today I received a call from their lawyers stating that I owe a bill close of a R1000 odd. To my knowledge and as per previous communication there is no amount I’m owing. The Lady that also called me was speaking way to fast for me to grasp some of the information, I am totally disgusted with their behavior as they also state that they were unable to reach me on the very same number the collections department lady reached me on.