thank you for posting into our forum. @mxamxulhaq1 is currently experiencing this very same issue. They received a notification about account review and video interview and are preparing for it.
Normally, you should provide Amazon as many invoices and authorization letters as you can put together. They will also want a photo ID to verify your identity.
I think that @Akmal can help you as he is dealing with reinstatements.
Here is the thread by @mxamxulhaq1 regarding the matter: