So I stumbled upon the process of unregs by chance, and further research of course brought me here. I've now got an account that I'd really really like to keep safe and need some input from you guys and your wealth of experience.

I've got the email, of course.
The account appears borderline inactive. But I wouldn't be surprised if someone came looking for it in a month or two.
I've slowly messed around with everything that can be messed around with.
The biggest problem is that changing the email is pinned.
I've already tried enough pins to exclude those that are common or made with an educated guess.

Ideally I'd like to change the pin/email, self freeze, and let it sit for a month, but since emails to the registered adress bounce, I'm not sure I could get the account unfrozen. Anybody have experience with bouncing emails and account recovery?

I do not want to submit a ticket.

Can anybody suggest some additional measures for me to take? Besides slowly guessing pins.
Tried searching old topics...but not really finding the right info.

I'd like to be able to fight the original owner and win should they try to reclaim the account.

Thanks.