There is no customer support. I faced a situation in which the payment to a merchant was done twice due to network issue. I wanted to lodge a complaint in PayTM. But there is no way available in any of the PayTM's platforms except Twitter. There are chat bots that provide a phone number. The phone call sends a message. The message link redirects to the chat bot in the app. People should be aware of the poor service support and stop using PayTM.