Irritated by the slow assistance

It seems like this days the only way to get help its though Hellopetter. I upgrade my contract as I changed cars, the Netstar guys were suppose to install the unit from 30th of March till date there is no one to install the tracking devise, when I ask why Junior Masuku keeps telling me they need to contact me first. I have been giving my contact details in since on the 30th. I have to be the one who keeps on asking when are they going to contact me so they can install the unit. I am so irritated at how this is been dealt with no sense on emergency and I have been with dotsure for 4 years now with no claims this makes me wonder should I need to make a claim is this what I will get...people saying they need to get hold of me but I never receive their calls.