How high up the chain did you get? If that is just from email communication then you need to speak via the phone to the manager?
Have you tried the eBike store in Ballard that has been there for years? I seem to recall they had some Easy Motion bikes at one point. But because they have always seemed to deal in off brand bikes, that are well thought out btw, their mechanics and staff outside the door greeter are knowledgable and may know of a battery rebuild opportunity in your region?