@Ntambwe Welcome to Microsoft Q&A forum!
You have posted your query with Azure Maps tag. Though it is not related to Azure Maps, looks like you are trying to register for an Azure Subscription and facing issues.
As mentioned in Azure free account FAQ, Azure is commercially available (but doesn’t include sovereign cloud products in US Government, Azure China, and Azure Germany regions). Azure is currently commercially available in 140 countries/regions. Check the country list for availability.
If available, there could be multiple reasons why you are seeing this error. Suggest you to follow the steps from Troubleshoot issues when you sign up for a new account in the Azure portal and Troubleshoot Azure subscription sign-in issues for more details.