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I did twice but no response (filled out the name of the community and gave e-mail address) what more can I do?

I think it's better to give up on it if it doesn't work.
Before the recovery I tried to change the keys but that was already not possible.

Looks like you like to pretend being a victim, but you are not. If you can't read the instructions on how to recover the account, nobody can help you ever.

The solution for your 'problem' is still written down here:
https://steemit.com/test/@steemchiller/r7jr7p

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