My older account Hacked

so it's been around a year i believe since i last played the game "World of Warcraft" i enjoyed my time playing it, and everything.
had several problems in game before and were resolved, but i tried recovering my account from the battle.net site, with the old email address i used for the account( i still use the same email), and i put my first and last name, and it said, "This e-mail/name combination does not exist."
i was shocked that something happened to my account, so i came to a conclusion that my account either got hacked, or i forgot the information that i placed onto the account, but i highly doubt that.
so can a GM please look at my post and help me get my account back please. D:
i want to continue playing this game, i was addicted too.
if information such as my memory of playing the game is necessary, i will provide it, i have a vague memory of the game, but i'm pretty sure it's enough.
such as: character names, realm changes, faction change, raids I've attended.
i just don't want to regret spending so much money on this account, and lose it all.