[2020] [Ubisoft Account]Problem with my account.

So a few years ago I made this Ubisoft account to play Watch dogs but unfortunately because it was so long ago I've forgotten the password to this account and can only login to it on through my PS4 account which is linked to it. I know there's an option to recover and change passwords through email but the email that is used for my account is no longer working so I can't even unlink my games from this account to play on a new account. I can prove that the email doesn't work and give details about my steam account which is what I use to play my games and I can also give details about my PS4 account that is linked to this account. I was wondering if this would be enough to prove my ownership of this account and either have it's email changed or have my games unlinked by a member of Ubisoft staff so I can play my games on a different account. If you would like to know my current working email it can be provided too. If there are any other details I might be able/need to provide please also tell me so I can get this matter over with this whole matter over with.