Stop harassing me and my children, I have said NO.

I am being harassed by the sales department, I DO NOT want to renew to another 2 year contract, I am quite happy with the month to month NOR DO I want to upgrade. I have made this abundantly clear but I continue to get called. In addition my kids are being harassed too, they are on my contract but Telkom keep phoning their cellular numbers. I have told the sales team I do not want another two year contract on ALL of my contracts and to stop phoning our numbers. Telkom has no right to offer contracts to minors, yet they keep calling!!!!