sam7440,

If you are in the US/Canada you can click the link below to request backup media. If you are in another region of the World you will need to contact Dell Support in your area to request the disk.

Request Backup Media- US/Canada Only

I am in Australia. I need to restore my laptop quickly.

Can i use the below mentioned link?

windows.microsoft.com/.../create-reset-refresh-media

Is it going to ask me the product key? I have not received it. It is told to me that the product keys are integrated.

Yes you can but see the notes here for specific details, there are some small subtleties:

http://dellwindowsreinstallationguide.com/download-microsoft-windows-and-office/download-microsoft-windows/download-windows-8-1-retail-and-oem-iso/