Hello Varghesekutty B,
Can you try and login via an inprivate window to the portal to confirm if it is the right account?
If it is, based on the previous answers I will recommend you open a billing ticket. This is free.
Create a support request in the Azure portal.
https://learn.microsoft.com/en-us/azure/cost-management-billing/cost-management-billing-faq
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola