Not sure if there is a word that expresses the horrible service

I app**** for ADSL WiFi with Telkom as we have an existing telephone line with them. Application was done on the 13/06/2018 I was told it would take 7 to 21 days. After the 21 days I called daily cause I got no feedback but kept being told they are offline, eventually on the 16/07/2018 I spoke to a consultant who explained they had no modems and will put my order through and will be contacted the Friday, Saturday the 21/07/2018 a technician came out for the installation but couldn't connect it due to some error, I was told she will log it to have someone come out and fix it. It is now the 03/08/2018 and I have no WiFi connection, all I have from Telkom is a modem. I have tried following up but got no joy and no answers. I DON'T KNOW WHAT ELSE TO DO TO GET SOME ASSISTANCE.....