I bought a pair of refurbished Astro A50s from Amazon back in April, and now they won't power down, and stay powered down (pressing the button turns them off, but they instantly turn back on). They produce sound fine, but have also started to randomly power down, even with sound playing (the headset is designed to shut down if no sound is being produced as means of saving power).

I contacted Amazon and they've requested that I send the headset back to them, by dropping the headset off at the "UPS drop-off location nearest you. ". The problem with this is that I have no way of getting to the nearest UPS drop off point, with the closest one to me being at Auckland Airport (I believe!). I'm not sure of my options here, and I am not really keen on waiting a month with no headset + paying the hefty shipping fees back to the US. Any help or suggestions would be appreciated.