Where can I find the return label to send my watch in for repair?

Thanks, but I don't want to return it. I have a support ticket to repair my watch. I'm trying to send it to the support for repairing my watch. I don't have a invoice and an order number, because I didn't bought it in an apple store but with a premium reseller. But the premium reseller charges extra costs for repairing it (it cost more than buying a new one).

Today I received a third box from Apple Support to send in my watch for repair, but again no return label. It must be me, who's not seeing it or doing something wrong I guess.

When I look into the support section I can't find any info on sending in a item for repair or making a return label myself. Only info for returning bought items or refund policy.

When I contact support they tell the return label should be on the box. But I don't see any label on the box.

Hmmm... any thoughts/suggestions/...