Hi,
I would suggest you raise a New Support Request with Microsoft, fill out all the relevant details as asked on the page. Please ensure that, at a minimum, you provide us with the Error code (the 715- number) and at least either of Transaction ID and the Email that you used to log in (if there’s a log-in).
Please ensure that there is no personally identifiable information (PII) (like passwords etc.) in the request details whatsoever anywhere.
Here is another similar thread discussing this issue. Please expect an immediate Email acknowledgement post submission with all the Case details and the Support Request Number. Microsoft's internal Teams will reach out to you to follow through further and provide a resolution as applicable.
You can also contact them via Twitter over here:
https://twitter.com/azuresupport
Best regards,
Leon