Hey how do I get back into my account since I'm locked out since I don't remember what email I used to make it due to this god forsaken update!?

Whoever the genius behind this new update(tbh downgrade) was royally screwed up because I and I'm sure a whole bunch of other users who don't remember what email they used to create their accounts are locked out of their accounts due to them deciding that you cant log in via your username anymore. also the help and support pages are either down or refusing to take messages.