IPhone :: Receiving Messages "your Apple Id Has Been Disabled"

I have been receiving messages "your apple id has been disabled" while updating or purchasing apps on apple apps store. Had followed the advice to reset / change apple Id password via Apple Id but problem still persists.

Had sent 2 mails within 48hrs to itune support store via "manage my account" but with no reply except an acknowledged email from itune support. BUT I replied on the acknowledgment email from itune even there is an disclaimer saying "please don't rely" on the acknowledgment email. After sending the mail, a person named "manjunath" replied as itune support centre staff, asking for verification before investigating the problem before enabling the apple id. he/she asked me to answer for some security such as billing address, last 4 digit of credit card no., last purchased apps and order no. The mail does not appeared to be and official respond from apple itune store, very suspicious .

Has anyone encounter this kind of mail, wonder whether is authentic and could rally resolve the matter? It seems that many apple id users have encounter the " your apple Id has been disabled" problem, many complained that there is no respond for itune support to rectify the problem.

Info:
iPhone 3GS