Account failed verification process

Hi all. Last week we have been informed by Amazon about a suspension of our account due to ‘Account failed verification process’. The email is not stating any specific reason.

In the last month we had ‘the normal’ process of yearly account verification and we have supplied all documents. The bank account or company or shareholders have not changed and we are already a seller for multiple years.

We are trying to contact Amazon to understand the reason so we can make the appropriate appeal, but their support comes back with the same references, without the specific reason.

Any advice, experience and information is very welcome. Thanks Marc