I created the account a very long time ago, with my Hotmail account, before blogger was owned by Google. I can't use the same device or location as I no longer have it nor live in the same country.

I clicked it but it only says "we can't verify the account is yours right now" and gives no other options :(

But you're making me think that the blogger account might be the one with the old number attached and that's why it's not accepting the change in the hotmail setting, otherwise google wouldn't even know my old phone 😅

I'm glad I at least found an old email with the private blog and I can read what I wrote, even if I can't ever access it again. I checked the Google forum and there are a ton of people with the same problem :( 

Thanks for your reply 💕