Has anyone ever managed to subscribe to Amazon Musics Single Device Plan? I've got a Harmon Kardon Allure portable with Alexa. If I ask it to downgrade my account, like the Amazon website suggests, it tells me to do it online. If I go online, the option is greyed out and the info says to do it by asking Alexa. It's infuriating. I've done a webchat and the rep said he'd sorted it but looking at my account, it's still on the unlimited account! Arrrgghhh.