Poor Service

I called on 30/08/2017 to follow up on a reference, I spoke to Ronaldo or Ronald who told me that i should expect a technician today(Wednesday 30/08/17). I then explained to him that there's noone at home, is there a way we can arrange for the technician to tell us when does he expect to be in the area so that someone wait for him. He said there's no communication between the call centre and the hub, everything is done via the system. I found it ridiculous that there's no other form of communication between the call centre and the hub. I then requested to speak to a supervisor and he put me on hold for almost 20 minutes. He doesn't have telephone etiquette, how can you keep someone on hold that long.