Hi Matthew,
If you don't have a support plan for your Azure subscription, you can still seek assistance from Microsoft Azure support by opening a free billing and subscription support case. Here's how you can do it:
- Go to the Azure portal (https://portal.azure.com) and sign in with your Azure account.
- Click on the "Help + support" option in the left-hand menu.
- On the Help + support page, click on the "New support request" button.
- In the "Basics" tab of the "New support request" page, select the appropriate options for the issue type, subscription, and resource group.
- In the "Problem" tab, provide a detailed description of the issue you're facing, including the error message you received and the steps you've taken so far.
- In the "Contact Information" tab, fill in your contact details.
- Review the information provided and click on the "Create" button to submit your support request.
Once your support request is submitted, Microsoft Azure support will review your case and provide guidance on how to proceed with deleting the resources causing the issue. They will assist you in resolving the problem even without a support plan, although response times may vary.
Alternatively, you can also try the steps mentioned in the link you provided (https://learn.microsoft.com/en-us/answers/questions/140197/unable-to-delete-vnet-due-to-serviceassociationlin) to delete the resources manually, if you feel comfortable doing so. However, if you're not confident in executing those steps or if you encounter any issues, it's advisable to seek assistance from Azure support.
I hope this helps?