Hi @Erwin Baris ,
to delete an Azure Recovery Services Vault you have to remove some dependencies:
You can't delete a Recovery Services vault with any of the following dependencies:
A full process is described here:
Delete an Azure Backup Recovery Services vault
I am not aware of any "force" option to delete a Recovery Services Vault.
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten