@Liana Maggid Thanks for posting your query on Microsoft Q&A.
All Azure customers have access to billing and subscription management support for free.
For Azure subscription billing and payments support, you can create a billing support request by following the steps here: https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request
Under Issue type, please select Billing as shown below:
If you still have questions, please let us know in the "comments" and we would be happy to help you. Comment is the fastest way of notifying the experts.
If this helps, please 'Accept answer' so that it can help others in the community looking for help on the same topic.