Hello Hani Ramadhan,
Thanks for your question.
Your best bet here is to create a billing support request.
Billing tickets are free and you can get detailed support on this. Just create the ticket here: https://azure.microsoft.com/en-us/support/create-ticket and select billing.
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola