At any time during the life of a store using this gateway, our banking partners review each account. Everyone goes through this standard review as part of ongoing monitoring to ensure users are in compliance with the Terms Of Service/processing regulations of the gateway. There can be many reasons for an account to be reviewed, but it's important to note that our Business Operations Team are the only ones who can exchange this information with you on this subject.
Because your concern involves sensitive information, we’ll need to access your account in order to resolve this issue. While we’re not able to provide account-specific support via the Shopify Community at this time, we’d be happy to continue assisting you through live chat, email, or callback.
Since this is the next step I've marked this reply as the solution for the benefit of others who may discover this topic.
Moira | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog