Hello Panayiotis Liotatis
Thanks for your question.
You can view the reasons why in the cost management section.
Log in to the Azure Portal: Portal
- Go to “Cost Management + Billing”: On the left-hand side, navigate to Cost Management + Billing.
- View Cost Analysis: In the Cost Management section, select Cost analysis. This will give you a breakdown of your costs based on different resources, services, and subscriptions.
- You can filter by date, services, or subscriptions, and generate custom reports based on your usage.
The above should tell you which resources consumed your subscription.
You can also reach out to support: https://azure.microsoft.com/en-us/support/create-ticket
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola