If you are getting errors from the bank on withdrawal. There might be a problem with your bank.
It may be a change in IFSC Code or bank.
For this, if you have any other bank, do let us know will update that, or else please share the correct details for the bank along with Passbook, Account Statement or Cancel Check anyone with your Name, Bank details and IFSC Code visible clearly by raising a ticket at https://support.flitpay.com/hc/en-us/requests/new .