Error while upgrading to premium

Hello,
here is the situation and   « I am reaching out to you regarding the chat 33887189 » .

The free site « temoignerensemble.wordpress.com » has been linked to my own site [marcomathieumedia.com] for several years. I run the « temoigner » site for that church group.

We have recently decided to make that site independent of my site and to upgrade it to « premium ».
1.  So, in order to do that, I first set up a dummy WordPress.com site for the new owner:
name: was it « Site Title » or maybe « witnesstogether » using a newly-created
gmail address: temognerensemble2022@gmail.com

2.  With that site, I then transferred the « temoignerensemble.wordpress » free site to the new owner.

3.  Then from within « temoignerensemble.wordpress » I  invited « marcomathieumedia.com »  back as an « admin », thus being able to continue to run the site  for them.

This screenshot from the site of marcomathieumedia shows the result of all that – and all worked fine. (click for media file)

Screenshot 2022-01-27 at 17.25.41

Now the error we made:

Instead of upgrading the main site, the person with the credit card upgraded the dummy site. This is now clear as you see from this next screenshot: (and as you can see directly on this site). Unfortunately the person holding the credit card person is not familiar with websites and is not fluent in English – and as I was only on the ‘phone with him, I could not see the errors being made. An upgrade and payment was made, but for the wrong site !

Screenshot 2022-01-27 at 17.08.41

So, please help us to change over the payment and upgrade.

We will be eternally grateful to you as always.

Best wishes.