Hi @Hertech Innovations ,
you can try to reactivate your subscription by yourself: Reactivate a disabled Azure subscription
If this doesn't work create a request with Azure Support for reactivation:
Azure Billing and Subscription support is offered by Microsoft by no cost and it's for free.
Source: Azure Support plans
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten