Q: Change my Apple Id and lost control of my devices

Fellows,

I changed my apple id because the email linked to it was cancelled by the provider many months before.

I made the mistake of not browsing thru these contents before and did this change before turning all off in my devices. Now I'm with my Mac and my iphone linked to an iCloud account that I can't reset / change.

I can't reset my iphone because it requires to turn off "Find my iPhone" and to do that, it requires the previous id and password, which doesn't work anymore.

Is there a way to solve it? I tried to reset, restore backup... but all requires the previous id and pw.

Best Regards and Happy Holidays.

Silvia