You are welcome to submit your invoice from Feuer und Eis to Miles & More. You can do this easily via the guest portal: https: //members.qiibee.com/feuer-und-eis/.
Valid for all new bookings made on the feuer-eis-touristik.de website, there is no retroactive mileage credit or mileage credit on existing bookings.
We cannot submit the invoice for you, as you would have to log in with your Miles & More account