I would like to regain access to an old website that is still linked to my organization’s email address. We know the account’s username, but the password we have on file is not working. I think that the password is not working due to inactivity. However, the website is still accessible online. I tried to submit an account recovery form but we cannot find any proof of ownership that is requested. We can prove that the account is linked to our email since we have received many emails from WordPress when website visitors fill out a inquiry form on that website. I would like to be connected to a Customer Service representative (=Happiness Engineer) so as to sort out this problem.
I think that the password is not working due to inactivity.
That is not something that would happen here at WordPress.com. What is the address of the site? Is it hosted here? If you still have access to the email connected to the site then you should easily be able to recover the site. https://en.support.wordpress.com/account-recovery/