You can change the address, hours, photos, and description once the page is on your account.
You have the login. Sign in, open My Account, and edit the page. If the old email is still one you can open, use Forgot password.
Someone else has the login, or they left. Create a free account and sign in, then send the request. We will check that you represent the business and move the page to the account you are signed in with. Use an email at the business website if you have one. A personal email is fine if you also include a phone number we can match to the page.
You do not need to add the business again.