Unexplained warranty decision

I bought a fitbit with 2 year warranty. The battery stopped working 1 year in. I informed them (twice as the 1st person was clueless).They made me do battery tests and once the tests proved the device was in fact faulty, they told me my device didnt qualify for replacement with no reason for the decision. Why not check before you make me do tests? Also, explain why. Dont just send me a link to your lengthy policies. It looks to me like I qualify. Guess I'll buy a Garmin now.