My Oracle Free Tier-database-instance has disappeared.

Summary:

Last connections might be 2 weeks ago, but certainly not 90 days. Why did it disappear and, more important, how can I recover the instance?

Content (please ensure you mask any confidential information):

You can find all info about the database in the TNS-connectionstring below:

(description=(retry_count=20)(retry_delay=3)(address=(protocol=tcps)(port=1522)(host=adb.eu-amsterdam-1.oraclecloud.com))(connect_data=(service_name=gfac38919a3d133_klaiwora_high.adb.oraclecloud.com))(security=(ssl_server_dn_match=yes)))

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):