If you purchase Microsoft Azure through an Enterprise Agreement (EA), you can add either a Standard or Professional Direct support plan to your Enterprise Agreement, by contacting your Large Account Reseller (LAR). Developer Support is not available through an Enterprise Agreement.
All subscriptions under an account will share the same support plan, and all users with admin/owner access to any of the subscriptions under the account with a Support Plan will also be entitled to support for those specific account’s subscriptions they have access to.
A Microsoft Azure account can be accessed from the Account Portal. From there you can see the list of subscriptions that belong to the account and will be entitled for support.
If you do not wish to auto renew, please log into the Account Portal, select the support plan in question, click on the “Change renewal details,” and unselect the default option to auto renew.
For more information, please see the following: https://docs.microsoft.com/en-us/azure/billing-how-to-cancel-azure-subscription
Note that Azure Support requires commitment for the duration of the subscription term. Cancelation will not result in a pro-rated refund.