Netstar your service is questionable

I took a quote online and was not given an option to book the installation on my preferred available time, so I took it upon meyself to call Netstar after requesting a callback and no one called back. After holding the line for 30mins I spoke to your consultants who told me that the Planners were all on calls and they will call me. I specifically asked to be called back at a certain time but no they called me at their own preferred time. I still asked to be called at a specific time and that was the last time I heard from them. When and how the unit will be installed it remains a mystery?? I'm starting to question if I should proceed and join this company if this is how we start a relationship