How to create a support Request with the support plan "Developer"

Main questions: How to open a support request without be blocked by the system? How can I see my burned costs with an azure sponsorship subscription?
Explanation:
The company have a Microsoft Azure Sponsorship. It is used for the investigation target to find out what are the involved costs in the future.
It was or it is not possible to check the burned costs ... maybe because it is a sponsorship ... so far no problem ... there is a support plan "Developer" included. This gave me only wrong answers and blocked me from creating a support request.
Please explain what kind of Help + Support Plan is "Developer". Is a human team behind? How to reach them? Creating a support request is with this question blocked. It is not possible to come to the button "Create". I know it exist I saw this outside of azure but here maybe it is the wrong support plan.