Hi Bob A I want to help you with this question.
If I understand you right, you want to upgrade your Support plan to increase your VM size quotas.
It's not going to work that way. We are talking about two different things here. One is a support plan model, which, depending on the plan, gives you options to contact Microsoft's official support for problems and questions. The other is your subscription or payment plan for deploying your resources.
By increasing the support plan the VM size quota does not change.
So see: https://azure.microsoft.com/en-us/pricing/dev-test/#discounts
Since you are currently using a Free plan for your Azure subscriptions, I recommend upgrading to "Pay-as-you-go" to adjust your resource limits.
https://azure.microsoft.com/en-us/pricing/purchase-options/pay-as-you-go/
If the problem is solved for you and all questions are answered, I would be happy if you mark the answer as accepted to close the thread.