Action when label creation fails

Hello,

first, thank you for the great plugin!

We use DHL shipment labels with automatic creation. When a label creation fails e.g. due to invalid address, we need the order status to change to a custom status, so the customer support can review the order and correct the address. We only could find a hook after successful label creation (woocommerce_gzd_dhl_after_create_label), but failed to find any hook that fires when the creation fails. Can you please help us or give us a hint how we could accomplish this?

Thank you in advance!

Best,

Chris