Old app lost the keystore

Hey there, I am working in this app that had previous releases to the play store, but it was not updated for some time, the previous keystore is missing and from what I searched here I need to generate a new one and contact google to reset to this new one for that app.

Is this correct? Is there a way to download the keys used to validate the app apk from the console? Is there a specific google contact channel for these cases?

Thank you!