Hello aspirant,

There's nothing to be worried about. If your online payment had got failed due to power or internet disruption, then when you get back online again, immediately check the payment status on the official website of JAM. If it shows that it is paid, a confirmation message will show you and you can proceed for further steps.  If it's not received by JAM, then you've to start again with the payment steps so as to complete the process. If in case, if the money is debited in the first attempt from the account, then it will be refunded back to your account. For payment, you will be charged only once. See, this happens often due to network failure and don't need to be worried, extra money if you had paid to JAM, it will be returned to your account.

Hope, it helps you.