How to delete an email address with Free

Hello,
If you're missing the address to send your cancellation letter, it's very easy to find: https://www.free.fr/assistance/171.html

Great, thank you very much! The process is indeed clearly explained in the link you provided. I quote for any potential people in the same situation as mine:
"Delete an Email Account
Free Email Account
To cancel a Free Email Account, send a free-form letter via registered mail with acknowledgment of receipt to the address below:

Free - Free Account Cancellation
75371 PARIS CEDEX 08

This letter must IMPLICITLY contain the username and password of the account to be canceled.

Deleting a main Free Account results in the deletion of all connected secondary accounts."

Hello

at Free, contact us, Freebox ID, manage, request to delete email address and then confirm the deletion of a secondary email address.

P.S.: Yesterday at a store I heard, "Do you want your receipt?" and the elderly customers responded, "No sir, with global warming, that should be banned."

hello
it depends on the reason for this letter
if it is to completely cancel free or just to MODIFY a main email account
otherwise deleting a secondary email is easy
so need for clarification

I have kept a free address that I opened online a long time ago without, if I remember correctly, this opening being related to any internet offer...

Thank you for the tip, but I no longer have any subscriptions with Free. All I have left is this email address that stores industrial quantities of spam messages every day!

re
I no longer have any subscription with Free.
That's curious! Normally, when you're no longer with them, you no longer have access to the associated email box.
Contact 1044 for more information!

You can always access a Free mailbox only if it is out of subscription
I didn't know that, so the question is:
how to delete (or close) an email account that we no longer use
because it seems that its email address actually corresponds to a non-subscribed address!
if Free cannot provide the information, who could then?
I think this question could concern any email address in this case.

I think the process is quite clear: you need to write a registered letter to Free with the email address and the password. My problem is knowing where to send the letter. Apparently, I'm still receiving a lot of spam on this address. That's actually what led me to migrate elsewhere.