You're absolutely right to be escalating this, and I fully support everything you’ve said. We've been through something similar but more complex. The full story is here https://sellercentral.amazon.co.uk/seller-forums/discussions/t/e63f0a7a-9122-4d11-9a62-164025109fb2?postId=e3c00515-4239-4248-b9e2-915a89bcb4e3.

But in brief, despite never shipping stock to France, Amazon has kept charging us storage fees from there and other unauthorized EU warehouses. Like you, we were told conflicting things: first that items would be moved back to Spain within 14 days, then that "upload errors" had caused delays, and eventually that the inventory didn’t even exist and was just a data lag.

Yet somehow, we were still being charged long-term storage fees for stock Amazon had supposedly purchased from us months earlier. I'm not sure if this relates fully to your case or not as you say you haven't stored stock anywhere in the EU, but it seems there is no functional EFN system anymore. We were led to believe that storing inventory in Spain would allow EU-wide fulfillment, instead, we’ve been punished for following Amazon’s guidance, with zero accountability.

We’ve been told to remove stock ourselves from warehouses we don’t even have access to, after Amazon spent months failing to remove it themselves. Then support insists there’s no real financial harm, only “perceived losses,” which completely ignores the very real costs we’ve incurred. You’re not alone in this; this is a broken system, and it’s causing measurable harm to sellers.

Sellers need protection from systemic failures like this. We come to Amazon in good faith, sellers should be valued partners and deserve fair treatment, yet far too often, we're met with disregard and disrespect. Our case has been going on for nearly a year and we're pushing now to be properly recompensed.

I'm not sure the best way for you to escalate this, we are considering legal advice if something cannot be agreed soon. It's a disgrace that things can get this bad, Amazon should be ashamed at how they treat sellers like us.

@Spencer_Amazonhas tried to help, he may or may not see this and leave a helpful comment for you, but even if he does that may or may not get you nearer to a resolution...