Telkom Harrasment

My family and I are being harrased by Telkom. All 5 of us have telkom numbers on one account and one of the numbers are due for upgarde. They keep calling all every day, even though I told them we are not upgrading. Block every number and tomorrw they phone on a new one. Complained and asked them to remove off database. NO LUCK.

What I'm I to do?