What do we do about the absolutely unacceptable le

I app**** for a new extension in my office almost a month ago. Last week Monday the technicians pitched up here to do the installation, WITHOUT the handset??!!! Please note that I have a Telkom Business Opticon Switchboard and this was specified in the order. All they needed to do was bring a handset and plug it in and program a few buttons on the switchboard. Now, more than a week after they went to fetch the handset and \bring it right back"I am still waiting with promises of installation every single day. As if that is not enough"