Hello,
Greetings from Microsoft Azure.
Once the Azure subscription is disabled due to non-payment, you will not be able to re-enable it. Hence, please contact the Billing support to re-enable the Azure subscription and also, to help you make the payment for the pending balance. Please follow
the link below to get help:
https://azure.microsoft.com/en-in/support/options/

Regards,
Sapna Girish
Sapna G