Frustrated, confused & annoyed. MixTelematics-get your act together

I contacted Beame via an online application to cancel my existing tracker as I have sold my vehicle. My request to have a new one installed in my new vehicle has resulted in a huge number of phone calls (Approx 13) from Matrix, MixTelematics, Beame, Powerfleet & Tracking Empire. As a result, I have no idea who to contact wrt my queries. I have requested a hard copy of my contract, but everyone at the customer care call centre says they'll get back to me...still waiting. And of course, you cannot get the same person to speak to. All you get is an acknowledgment of email with a different reference number. I regret my decision now to with Beame (if that is even the correct name). I should have selected a different supplier!