Poor service

I am a client for the past few months. I purchased the DLINK on a package from Telkom. This whole month I have been trying to inform them that this is not working. The Wi-Fi is not working since last month February. I have reported it last month. I was promised that it would be fixed. Till today its nit working. I have tried calling them but cannot get through. They a quick to bill you like the service is working where as it is not. I cannot get through to their call centre at all. This is pathetic. I am contemplating cancelling this package I have with them.