Cannot access my wp-admin are after revert

Dear Ithemes Security Team,

I write to you hoping you can help me restore my website, which I cannot access since I installed Itheme security and two other security plugins. (Ask Apache Passwordprotect, Google Authenticator)

My Setup is:
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Macbook Pro, OSX 10.11.6 ElCapitan
MAMP V 3.5
PHP 5.6.10
Apache Server
WordPress 4.7.2
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Trying to improve my websites security I installed a couple of plugins (ithemes security, WP Google Authenticator and Ask Password Protect). First everything was working fine, I changed the prefixes of my database, changed the location fo my login/wp-admin, updated salts, enforced strong passwords, etc. After a while I realised, that various other plugins did not function propperly on my site. One of which was the two way authentification from Google Authenticator.

I decided to deactivate the undo the changes i did (database, login…) and deinstall the plugin.

Never the less I became aware of addtional problems over the next 24h. WordPress automated mailing function did not work anymore. It was not possible to reset the password using the “forgot password link”.

Finally I decided to revert to my backup version of my “wordpress installation/root file” and upload a backup of my database via phpmyadmin. Seems that I am suddenly facing issues with phpmyadmin as well and I could only manage to upload parts of my database before the server disconnects during the upload process of the database without an apparent reason.

Eventually I managed to upload a database and could manage to get my website running again. But I am not able to access the wordpress admin area. My regular password does not seem to work. I can reset my password clicking “forgot password”, and change my password following the link in the mail. This seems to follow through well, but the new password then does not seem to work neither. I also tried to change the password for my user directly in my database using phpmyadmin.

I am quite sure the issues are being caused by the security plugins I installed and the changes I did to the setup.
But I think I have to look for changes that affect settings apart from my wordpress root file and database (since I reverted to backups for both and still face the same issues). I think there is an issue with my apache server or some other global setting I am not aware about.

Please let me know if you have an idea what could cause this issue and how I could solve it. By now I spent a week trying to fix it and am well out of ideas, so I really hope you can point me in the right direction. Please let me know if you need any additional information.

Thank you for your support,
best regards,
Max