GTINs issues

Help .

amazon removed most of my listing .this the message i got .

This ASIN has GTIN codes that do not match the brand associated to the ASIN. GTIN codes are reliable data that are used to limit duplicate products in the catalogue and ensure product authenticity. We verify the authenticity of GTINs by checking the GS1 database and GTINs that do not match information in GS1 are considered invalid. We recommend obtaining your GTINs directly from GS1 (and not from other third parties selling GTIN licences) to ensure the appropriate information is reflected in the GS1 database. If you believe we have removed your ASIN in error, contact Selling Partner Support here. Repeatedly creating ASINs for brands you do not have a relationship with will result in the removal of ASIN creation abilities.

I refurbish this item by myself .

any help is appreciated

thanks