same thing happened to me.
like 2 weeks ago. i bought 5 sor account with real money. and merged them all into 5 different bnet account. 2 days later. all 5 were banned. and not receive an email about it.
so i open all 5 ticket say why account banned?. they say i will need an recovery form and an id to recover it.
so i send in the form and my id. and they unlock one account. but all other 4 say that the name dosen't match the account.
and 1-2 later again. they banned the unlocked sor account again...
i ask why again.
they say it was done in error. etc .etc.
i think blizzard is aware of people buying sor accounts. which is not theirs.
so if ur unlucky they banned u within 48hour and ask for an id.
if ur lucky they will just let it go.
also theres alot of people answers our tickets. some of them are nice and would just say " We'll just accept your id and unlock that wow account" some are very serious. and "hell no" unlocking that account, cause they know that sor account isn't yours.
plus if u go crazy and keeping responding that ticket and have like 10 reponses, some might just get lucky and have a nice person answer ur ticket
tip: u can ask them to unmerge that sor account. but that dosen't un-banned that account