This is Pia from Amazon to assist you with your account reactivation.
You are stating that you know nothing about the related account and unable to understand what documents to provide as proof and have submitted multiple appeals to prove the same.
We are forwarding this matter internally to the concerned team. They will reach out to you directly for further assistance.
Please be informed that internal reviews may take time in getting your issue resolved as this involves thorough investigation if your account.
Stay close to your emails/performance notifications for any updates and kindly follow up on the same, if required.
Thank you for your post. I hope my response is beneficial towards your business.