I'm sorry to hear about your brother's unfortunate experience, but I hope this will teach him a valuable lesson, that given the advanced technology of today's internet hackers, he should never be readily seduced by emails sent to anonymous senders. Your account will vanish with a single click.
Though you can try contacting customer service but  I think it  won't guarantee that your brother's account will recover, but it will at least maybe it would allow you to try and get some assistance.