nighmare with Netstar

Every Thursdays to weekend, the App does not work. I got into an accident about a month ago, no call, nothing to show if the sensors work. I called in asking for a report to show my insurance where I was hit but they could not help me since the system is down, I asked to cancel with them and stated my reason, but they could not care less. My panic button never worked from the moment the 2 trackers were installed, when I get into dangerous zones I don't get a call, I receive an SMS that needs my responds. I asked them what if I get ******, what will happen. I am paying but their services are poor. I was told if I want to cancel, I must pay a fee of 4k. I strongly believe should my car gets ******, its the end of me.