Battery depleted when not in use?

My RMA was approved yesterday but unfortunately I still do not receive the email with the link to the UPS tracking label. I’m confused. I have asked on the “MySansa” page, had a chat session with a support rep and the only thing he did was to re-sent the RMA approval email. Is this normal? I don’t have the return label nor know the return address I should send the unit to. He told me I should receive the second email at the end of the day but who knows. Frustrating indeed.