Discovery insure opportunists

I'm so irritated & ****ed of right now,I've been trying to get my faulty DQ tracker replaced,well the faulty one was replaced with a malfunctioning one which each time when I call each consultant makes changes on settings & attributes the problem to settings which after changes the tracker continues to malfunction but they are holding back to authorise a replacement & this is costing me my miles,lots of airtime minutes & drives to tyger wheel & Tyre.. on the 7th a 2nd replacement was authorized but when they were called they canceled saying it's not linked on the system...got linked but continues to malfunction...I even tried another phone to connect last week...now today they saying the other phone is the problem...I so want to swear 🤬