Hii Gbenga Olubitan
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Check for messages about your subscription. If it's locked due to unpaid bills, there may be a way to fix it.
Go to "Cost Management + Billing" to check your invoices. Look for messages about
the reason your invoice is locked.
create Azure support ticket for billing and subscription management.
https://azure.microsoft.com/en-us/support/create-ticket
If you cannot unlock the subscription, click on "Help + Support" and submit a new support request for help.
https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request
If you have any further queries, do let us know.
If the answer is helpful, please click "Accept Answer" and "Upvote it".