Hello Veli Ngwenya,
Greetings! Welcome to Microsoft Q&A Forum.
I would request you to please try creating in some other region, it could be a interim issue. Also please check if you have Registered 'Microsoft. Storage' in the resource providers menu in the Azure subscription. Select the item and click on 'register' on the top of the page.
Also please review the Validation errors and check if you are seeing any of these and resolve with the mitigation steps provided in the doc.
As you are using Free trial subscription: The free credit subscriptions doesn't provide the same options as a paid subscription. The latter would provide you with an additional menu to pick specific regions, and custom options in redundancy as well.
If you still have credits in your account: Try to sign up using Chrome and in an incognito window or clear all your browser cache and try using the Edge Browser.
Make sure you have not used the same Credit Card before that you have used earlier for Creating a Free Azure account. Azure free account FAQ
Troubleshoot issues when you sign up for a new account in Azure portal or Azure account center: This short guide will walk you through the sign-up process and discuss some common issues at each step.
Create a storage account
You can also contact Azure subscription team for more specialized assistance on this Azure Billing/accounts/subscriptions/payments support, it's free, . https://azure.microsoft.com/en-us/support/options/
Hope this information helps! Please let us know if you have any further queries. I’m happy to assist you further.
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