Being billed for line that hasn't been installed.

My husband and I have been trying without success to have a line installed at our property in Himeville for over 4 months now. Telkom are now billing us for line rental, despite never having even been to the house! Although we are now living overseas, we have family who have tried without success to get someone to meet them at the property to check/install the line and start the wifi installation, but no one seems able to assist. Can someone please help us? This is a rental property and needs to have wifi installed urgently.