Hi Ozgun,

Unfortunately, we have been unsuccessful in trying to recover your instance.

You may request a new instance by following the below steps:

Login to https://developer.servicenow.com >> click either "Start Building" or "Request Instance" on the top right-hand corner.

Developer instances are not guaranteed the same reliability as production instances - they can be lost due to hardware or backup failures.

Please ensure you are using update sets or a git integration to back up the changes you've made within your instance. This will help to mitigate this issue moving forward.

We apologize for any inconvenience caused.

Regards,

Kamini Kansal