HELP PLEASE

I bought a psn on here a while back and I have had it for sometime and then today I go to log in and it says Incorrect passcode and I try resetting the password but the email I used was invalid. I have all the og info to the account and I call song and they say I need the original serial number but I don't have the serial number!! how can I get it back 

I Can get it back for u off of common pass jacking pm me the psn.

lol xD! oh he's probably crying right about now

Someone could've reverted It back to OG email. Try Og email and your password and see if that works

If not then someone must've jacked it from you. Try to find old seller see if he took it back

And people are still dumb enough to turn down PSNs with no aids. Lmao.