You need to create a support request for assistance on this
Violations are reviewed by the security team if you feel that your case needs to be revisited, create a support ticket. You can do this either online or through the portal ( portal.azure.com ) by searching for Help + support and clicking on Create a support request (Issue type: Subscription management / Problem type: Re-enable my subscription).
See reference: https://learn.microsoft.com/en-us/answers/questions/1656210/azure-subscription-disabled-for-suspicious-activit
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola