listing removal because of design complain

We received your submission but do not have enough information to reactivate your listing at this time. To reactivate your listing, please provide any one of the below documents for proving authenticity of your listings:

-- A letter of authorization (LOA) or licensing agreement (LA) directly from the rights owner indicating that you are authorized to use their intellectual property. You can find the contact information of the rights owner in the listing deactivation communication you have received.

-- An invoice directly from rights owner to indicate that your products are original and are purchased from the rights owner directly. You can find the contact information of the rights owner in the listing deactivation communication you have received.

-- A retraction from the rights owner to be sent to Amazon directly. You can find the contact information of the rights owner in the listing deactivation communication you have received.

-- Proof of design registration for the listed product.

i have submitted my design registration certificate which i got from IPO UK

but amazon rejected it

dont know what they asking for proof of design registration