I've requested @@Aaron to reply here and i've placed him in TWC for the meantime.
I assume you bought the account off-site? since I could only find http://osbot.org/forum/topic/98039-3-nmz-accounts/ as a reference to this particular dispute. <-- That being a price check thread.
About the refund amount I can't really enforce a refund of 250M since we can't prove that you had 25M worth of items on both accounts (50M in total). That being said this will be decided on later by the other staff.
Can you post the account thread link (the offsite one)?