Hey dasaka(or IGoPiePieeeeee)
On what server did you use to play? North America, Europe, Italian or Turkish?
If you played on the italian server, please follow this link
Tranfer Account from Italian server.
But I doubt you've played on that server.
If you played on any other server, you have to submit a ticket containing information about your account, like username, email address, names and levels of most used characters, the server where you played (very important) and the aproximate last date when you logged in. You can read more at this link:
Tranfer Account Info.
You can submit the ticket at this link:
Create Support Ticket for Account Transfer
Please be aware that if you created and leveled any character on the current My.com account, after the transfer, all those characters will be deleted.
If you have any other questions, don't hesistate to ask.