Enable Windows Azure Subscription
once your account has been cancelled the only way to revive it is by going to http://commerce.microsoft.com sign in, make sure you select subscription from the drop down near to your name on the top right side (to check if its the correct, select subscriptions and there should be the subscription that is cancelled) once u r under the correct one, go to payment options and add or change ur credit card... this then will update the service and resume the service... after this is done and everything is cocher, you can go to the account portal of azure and manage payment options from there.
Please follow the link below to create an incident with Windows Azure Commerce Team, and they will provide necessary assistance to get your Subscription enabled and get going:
https://support.microsoft.com/oas/default.aspx?prid=14234&st=1&wfxredirect=1&sd=gn&ln=en-us
Go to the Windows Azure Account Subscriptions page and change the payment method on your chosen subscription.