keep getting threatening enails about equipment that was returned

Hola @SJShire, We try to make the return process easy by providing the prepaid return label and it sounds like you did everything you needed to by sending the device back right away. If the process you went through was a warranty exchange, then our experts should be able to pull up a copy of the return label and see the address on it. We have a few different receiving warehouses in the country, so it makes sense why the person you spoke to may not have known off the top of their head. You are right that they probably should have used their resources before just telling you they didn't know. With that said, the tracking label only goes so far. If the box is lost in transit, there are options that we have to escalate through UPS and that does not come back on the customer at all. A situation that we do run into sometimes, though, is that people will put that label on a box that has some random stuff in it. People have sent us rocks, grocery bags, trash, really old phones, and so much more. That is why tracking is not usually used as proof of receipt. It is a really crappy fact that some bad apples have ruined it for the rest of us. The good news is there are research options that protect honest people in situations like this. 

I wish that I had the capability to research the situation for you, but we don't have the account access to review those finer details. We do want to make sure that you get some kind of resolution, though, so I would recommend reaching out to our T-Force team through Facebook or Twitter. They are an amazing and resourceful bunch and I am sure they would be able to get you more answers.