EXTREMELY UNFAIR , BAD CUSTOMER SERVICE

I've joined nestar tracking service in April and i have been religiously paying my monthly premiums with no hustles..the biggest concern is even though i have being paying i dont get the service at all there NO TRACKER DEVICE INSTALLED..I have been phoning this company for manier times but i get no joy at all..they dont honour their promises ,i had to take time off work on two occassions waiting for them to install ...TODAY 17/10/2017 they phoned me again and said they will be at my work place at 12h00 the guy only came here around 12H35 unfortunetly i work with clients as well and had an appointment which i had to attend to at 12h15. Refilwe phoned and told me that they cant wait for me for more than 30 min so he had to leave...that to me was so unfair because i dropped my appointment rushed back and 5 min away from my work they had to leave....Netstar am really disappointed and frustasted by yourself.