I wouldn't waste your time, all you will get is responses like below from as high up as escalation, i have been fighting this since March. Do a search, and you will find 30 + posts from other sellers facing the same issue. Amazon won't accept that there is a problem, they are right, we are wrong.

Amazon has already been investigated by the CMA (Competition and Markets Authority) back in 2022 for similar things in regards to buy box/featured offer and made commitments.

This is the type of response I and many others have to deal with. They just wont accept or understand that trying to force you to sell at a price that instantly results in a loss because that price is less than fba fees otherwise you lose the featured offer/buy box, is wrong!

They have even admitted/acknowledged that i am selling at a loss and they seem to think this is fine

""We understand that you remain concerned about the competitive pricing benchmark applied to your listing and the questions you have raised regarding comparator validation, pack quantity differences, and UK market pricing.

We have thoroughly reviewed your case, including the detailed evidence you have provided regarding Amazon's Revenue Calculator showing a negative profit at the suggested competitive price. Your case has been investigated by our specialist pricing team and reviewed by our Leadership Team in accordance with our standard escalation procedures.

As we previously confirmed, your offer is currently not eligible for Featured Offer status because the price is not competitive based on prices we have recently observed at other reputable retailers. While we acknowledge your concerns about how this benchmark is calculated and whether it accurately reflects the UK marketplace for your 100-piece pack product, our investigation has determined that the competitive pricing benchmark is being applied correctly based on our current pricing policies and the data available from reputable retailers.

We recognize that this is not the outcome you were hoping for. However, sellers are responsible for setting their own prices in Amazon's store, and Amazon determines which offers to feature based on multiple factors, including price competitiveness. While we do not require you to match any specific price, offers that are not competitively priced may not be eligible for Featured Offer status.

This represents the conclusion of our investigation into this matter. We are unable to provide further escalation or additional review beyond what has already been completed by our specialist pricing team and Leadership Team.

We appreciate your understanding and thank you for selling with Amazon.""