Need help with my other account

I have a 2nd account that I haven't played in over a year I believe, and I've forgotten basically everything about it except what the password might be, It was right before the merge with battle.net so it never got switched, but I also was changing the email address but I'm not 100% sure if it changed, I plan on contacting billing later if this doesn't fix it, just wondering if you can send the information to the email associated with ranntar on elune, I can give other personal information if needed but I read that was really all that was needed, thanks for any help!