Hello Asdae.

We have removed your account details from the post, but we strongly advise you change your password as soon as possible to ensure the safety of your account.

As for your account name issue, you will need to contact these guys for assistance with that due to the private nature of the information we may require in order to proceed:

Account and Payment Support
http://eu.battle.net/support/en/article/account-and-payment-support

Thanks.