Vodacom Bad Service

I took out a contract with Vodacom March 2020 and it ended in April 2024, suddenly after 6 months I am summoned with a letter that I owe Vodacom R149.99 and I should pay it within 20days or else I will be handed over. I called called Vodacom yesterday for clarity and I was told that it is a BOC a jargon understood by Vodacom .My issue is that no one has contacted me nor did I receive an email from them which they claim it was sent according to my email trail nothing was received from them.My name is now listed on ITC but I was not given an opportunity to rectify this before hand ,can Vodacom remove my name on ITC because it's not my fault that your organization is on slow/delay generating what we as customers owe.I recommend people I know to use Vodacom or take up a contract with them