If your Bank is showing not verified you can Simply login into your account via Website and Go to Profile > Bank Accts and Check for Verify Now option and click on that ( Screenshot Attached ). or Go to this link https://bitbns.com/trade/#/profile/bank-accounts and wait for 5-10min.

Note: Even after clicking on Bank Verification It stays Unverified Please raise a Ticket and Remember sometimes the wrong Account Number and IFSC code give some Error like *Already tried to verify. Please contact Support*. Then Check Bank account details and if everything is fine Raise Ticket