Amazon executives monitor social media and often resolve. Always make sure you first go through the formal process.
Since 2015 ASGTG has been the only free sellers group for legitimate sellers vying for a level playing field with black hat international sellers. This page will document some of the horrifying suspensions / Issues of legitimate sellers and if they were resolved. Many of these have gotten reinstated by these escalations. Most recent first.
To escalate your issue: post on Twitter and tag @amznsellerhelp (this is official Amazon). Make sure not to reach out to anyone else that reaches out. You can also tag @amazonasgtg
You can also post on ASGTG FB using #workWithUsAmazon . This is not official Amazon, but Amazon lawyers and executives follow this channel.