As per facts of your case and order of Sessions Court in revision order you are bound to pay unless that order is modified. You can WhatsApp your wife and ask her Bank details for paying maintenance as per the Court order.
E mail,WhatsApp and Telegram sources of social media is allowed by Supreme Court in its recent ruling that summons and notices are valid services on social media construed admissible evidence under the Law for service and record.
Your problem to pay your wife maintenance as per the order of Sessions Court may be brought to the notice of the Sessions Court for modification or extension of time by filing a miscellaneous application for REDRESSAL OF YOUR GRIEVANCES DUE TO COVID-19. The Court may take leniency in your matter while disposing of your case.