Export Kayako for import into a new system

Hi.

We are about to move from kayako to a new system.
I need help and documentation on how to export the database or similar to be able to imort it to the new system.
What tables do I need and how should I export them?
I need some kind of schema so that the new supplier can import into the new system.

I have made a ticket about this also but I thought that if someone here can help out it would be great and if not I can add the info from kayako to help others in the future.