Netstar - worst service ever!!!

Worst customer service ever! No one can help you! Netstar installed a tracking device in my car first week in January. Only to find out after month and a half of struggling to get anyone to help me, that Netstar installed the wrong tracking device (which does not have the real-time app tracking capabilities which I have requested from day 1). Also, today I am told to only use the Toyota app and Toyota tracking device in my car - but why then (advise me to) install the Netstar device (and take a debit order x2) in the first place? Why then use Netstar at all? After numerous emails, calls, etc still no answer or solution is provided. Netstar's comment remain - just use your Toyota app. So still the question, is it impossible to use the Netstar app if you also have the Toyota tracking app? And if I have indeed received the wrong Netstar tracking device without the real-time app tracking capabilities, why not just say, let's fix it and this is how we are going to do it ... ?