Oh dear! I used directservice_uk@playmobil.de on 13/3/23 and had a reply. I had a message from service_uk@playmobil.de* on the same date, but that was them sending me a secure link for payment. Maybe they have changed their email addresses? Direct Service was the former name for Playmobil Plus, so that might be why. Let us know if you do find an address which responds, I need to request some parts myself!
*this is the email address given on the co.uk website. There is also a web form for contacting Customer Services at
https://www.playmobil.co.uk/CustomerService-Contact which might be worth a try.