Hi,
Please create a new billing support request using my instructions below. Following my instructions will allow you to create request so that you can contact support engineer to discuss the charges.
Billing support requests are free of charge. The key is to not click on any of the recommended solutions and finish creating request. This will avoid being stuck in a "loop".
Use this link to start the process:
https://portal.azure.com/#view/Microsoft_Azure_CostManagement/Menu/~/support/openedBy/AzurePortal
NOTE: The link above should take you to Cost Management -- Help -- New support request blade in the Azure portal. If for some reason the link doesn't work you can navigate there manually.
Fill out Summary, Problem type, Problem subtype, click Next. There will be a delay, then some recommended solutions will be shown. DO NOT CLICK on any of the recommended options shown.
In the upper left corner, click Return to support request

Click Next to move to Additional details tab, fill out required information, email/phone, etc., click Next, review details and submit case. After submitting you should receive an automated email with a few minutes and a support engineer should contact you within 1 business day.
Please click Accept Answer and upvote if the above was useful. If something is unclear please add a comment below.
Thanks.
-TP