Can no longer sell brand product - is there a way to fix this?

Hello, Sellers,

Several weeks ago all my ASINs of a certain brand (not PL, sold for 3-4 years) became inactive on all AZ EU marketplaces. Not long ago the same happened with another brand products. No notification was received before. (A perfect present before Q4)

I found out that I need to request approval. But I click on the “Request Approval” button it takes me to another page where it simply says " Your account does not qualify".

I have the authorization letter from the brand owner to sell these products.

Recently got this response from Amazon support:

"Our aim is to provide the best possible shopping experience in our store. As such, our selling requirements are based on a number of factors that ensure a good shopping experience for customers.

If an application becomes available to sell this product, you will see a Request Approval button appear next to the product in the Add a Product feature in Seller Central."

At this point, I am not sure if this is a “canned response” or this is a clear indication that this is a dead-end or maybe I should take other actions.

Any advice on who has experience with this kind of issue is greatly appreciated.