Struggling with first product creation

Hey,

I try to sell a whitelabel product by dropshipping on amazon. I want to use my company name as brand name. It is not possible to protect this name in germany, but I want to use this name in my product listing as brand name. I also ordered a list of 1000 GTINs on gs1-germany, so I thought it is enough to create my first product.

Now I have the problem, that I type my brand name in the brand name field and also put one of my valid GTINs into the GTIN field of the product variants.

First problem: Amazon is comparing data from my product description with the data from my GTIN on gs1. There I get the error, that the information does not fit to the product that I want to offer.

Second Problem: I have to prove that the entered brand name in brand name field is my brand. So they want pictures of my product with the brand name on it. But my product is a whitelabel-product produced in factory and directly sent to customer. At the moment there is no label or logo on the products. So how can I prove that they accept my “brand name” ?

Did anybody get a whitelabel product online with hiw own brand name?