Hi Arijit Ghosh,
Thanks for reaching out to Microsoft QnA.
Depending on your environment, you can cancel an Azure support plan with the following these steps:
- Navigate to the Cost management + Billing Overview page.
- Select the support plan that you want to cancel from the Your subscriptions page to open up the Support plan page.
- Select Cancel to cancel your support plan.
A subscription owner can navigate in the Azure portal to Subscriptions and then start at step 3.
- In the Azure portal, navigate to Cost Management + Billing.
- In the left menu, select either Subscriptions or Azure subscriptions, depending on which is available to you. If you have a support plan, it appears in the list.
- Select the subscription that you want to cancel.
- At the top of page, select Cancel.
- If you have any resources associated with the subscription, they're shown on the page. At the top of the page, select Cancel subscription.

- Select a reason for cancellation.
- If you have a support plan and no other subscriptions use it, select Turn off auto-renew. If other subscriptions use the support plan, clear the option.
- If you have any running resources associated with the subscription, you must select Turn off resources. Ensure that you already backed up any data that you want to keep.
- Select Cancel subscription.

After the subscription is canceled, a notification shows that the cancellation is complete.
If you have any outstanding charges that aren't invoiced yet, their estimated charges are shown. As described previously, you get a final bill at the end of your billing cycle.
If you have any outstanding credits that aren't yet applied to your invoice, the estimated credits that apply to your invoice are shown. For more information about data update frequency, see Cost and usage data updates and retention.Depending on your environment, you can cancel an Azure support plan with the following these steps:
- Navigate to the Cost management + Billing Overview page.
- Select the support plan that you want to cancel from the Your subscriptions page to open up the Support plan page.
- Select Cancel to cancel your support plan.
A subscription owner can navigate in the Azure portal to Subscriptions and then start at step 3.
- In the Azure portal, navigate to Cost Management + Billing.
- In the left menu, select either Subscriptions or Azure subscriptions, depending on which is available to you. If you have a support plan, it appears in the list.
- Select the subscription that you want to cancel.
- At the top of page, select Cancel.
- If you have any resources associated with the subscription, they're shown on the page. At the top of the page, select Cancel subscription.

- Select a reason for cancellation.
- If you have a support plan and no other subscriptions use it, select Turn off auto-renew. If other subscriptions use the support plan, clear the option.
- If you have any running resources associated with the subscription, you must select Turn off resources. Ensure that you already backed up any data that you want to keep.
- Select Cancel subscription.

After the subscription is canceled, a notification shows that the cancellation is complete.
If you have any outstanding charges that aren't invoiced yet, their estimated charges are shown. As described previously, you get a final bill at the end of your billing cycle.
If you have any outstanding credits that aren't yet applied to your invoice, the estimated credits that apply to your invoice are shown. For more information about data update frequency, see Cost and usage data updates and retention.
Refer doc for more details :https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/cancel-azure-subscription
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