Not able to change my name on gmat site

Hello guys,

There is a difference between my name on passport and the name on my mba com profile. I sent a mail to asiapac customer care on last Saturday. I did not get any reply after 3 days. So I called the customer care and raised an incident. The dude on the phone asked me to send a scanned copy of my passport and I mailed it to the id he had given. Next day I called again for the status. He told me they did not receive any mails from me!!! I sent it again from my rediff id and then gmail id. I ccd some other id and I received the mail but they did not!!!. I called American customer care and they told me that they did not receive any mails from me. I sent different formats of my documents(image,pdf etc) to different ids. They still did not receive it. The customer care dude sent me a test mail and I replied on that mail and they still did not receive my mail. Just 3 days to go for my exam. If they do not change my profile name I will not be able to take the exam. Please help.Thanks in advance.