I need help with opening an email!!!

Hello,

I'm desperately in need of some assistance! I have an account that I have not opened since 2012... thinking I would preserve the accounts saved emails. Well I need those emails for a legality issue.... the reason I saved in the first place!! I of course don't have the correct password, and have changed my number at 20 times since.... I have working knowledge of retrieving my info!! Please help!!!