NuDebt and Mtn account nightmare

We had an Mtn account 2 years ago and cancelled it, they said on 2 separateoccasions that we do not owe them anything. I do NOT know why they are saying that we owe them, but we keep being harassed by them and Nudebt, so we paid it.

But we are STILL GETTING HARASSED via calls and texts for something we didn't owe but paid for already!!!

We tried to call but no answer and I have no more time, patience or money to waste on them.

Payment made into your account on 07 January 2022, R214, and email was sent to your email address.

Since I am not getting any feedback on their phone lines or email, maybe this will wake them up.