I had the exact same problem with a Japan-bought Kindle Oasis used in the US. My Oasis got stolen right before I left for the airport, wanted one while on my tr

I had the exact same problem with a Japan-bought Kindle Oasis used in the US. My Oasis got stolen right before I left for the airport, wanted one while on my trip so ordered one in Japan. I got the exact same run around trying to get special offers removed: US support says to ask JP support because it was bought there, then JP support says to ask US support because it's registered there. There was an additional problem that 3G only works in Japan for those Kindles. I ended up sending an email to jeff@ asking for an exchange of the Kindle to a US one. Ended up getting a one-time credit for the cost of a new Kindle with 3G.