Isn't the Azure portal fun!
Per the help docs, only the Account Administrator (the person who signed up for or bought the Azure subscription) can make changes to the billing methods.
The billing roles are used for accessing invoices rather than payment methods.
You can't fully delete a department once created. You can edit the name but if you delete, it will just change to an inactive status so you can hide it from view. The reason for not allowing deletion is in case there is historic usage associated with it where department would be listed in historic reporting.
I've had this same issue at my business site - I ended up calling support and they could remove it for me. You should have a dedicated account manager that will help you expedite this request.
It happened only once in my case, but that's all I have to go on in trying to
help you out here.
This might help you: https://kwizzu.com/construct.html
Either you merge them together: Merging audio and video using ffmpeg
Or you can use VLC to "watch"/"hear" multiple files at the same time: Watching separate video and audio files
The most advanced solution is to create one video file with multiple audio tracks. This is described here: https://...
You can use an Azure SQL database with a free Azure website. You just need to configure your website to connect to the Azure database. In the .Net world, this is typically done using your web.config or a connection string builder.
The cheapest Azure SQL database you can get is currently the Basic Tier which is priced at ~$5/mo. The cheapest Azure website ...
You cannot change clock speed of Azure virtual machine as Hyper-V underneath this machine just does not have such functionality. All you can do - change quantity of logical processors and set physical processor`s priority for your virtual machine.