HI Mayank,
In this instance can you contact the billing team as they will be able to support you, for free trial accounts you can check the terms and conditions.https://azure.microsoft.com/en-gb/pricing/purchase-options/azure-account#:~:text=If%20you%20sign%20up%20for,monthly%20free%20amounts%20of%20services.
Billing team
Hope this helps.
JS
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