HELP! Someone else using my EAN registered with GS1 illegally on Amazon

I am a new seller on Amazon, I first bought EAN codes directly from GS1 for my products and chose to share with Amazon, then I went to create a new product only to find out someone is fraudulently using my barcode for a completely different product, they are selling art while my code is registered for my own brand selling baby products in another country.

I opened a support case with Amazon and they asked to provide a ridiculous amount of documentation to prove it’s mine and I happily did, they confirmed what I provided is sufficient then said they will escalate to another team in Amazon, since then it’s been sitting there over 3 weeks and no timelines given except we’re working on it.

Anyone been through this before? It’s unfair that I can’t sell my products while someone else is illegally enjoying the codes I paid for!