<t>I had a similar issue. The app service plan couldn't be deleted, but I wasn't able to access is properly from the Azure Portal. I managed to remove the plan like this:<br/>
<br/>
- Make sure all related apps (web jobs, ...) were removed.<br/>
<br/>
- Open PowerShell and log in to your Azure account:
Login-AzureRmAccount.<br/>
<br/>
- Remove the app service plan:
Remove-AzureRmAppServicePlan -Name -ResourceGroupName.</t>
