OS X Not Booting into Internet Recovery
Your iMac : 2007 (mid) doesn't support Internet Recovery. You can wait 1 month or use the faster way = Head to a Apple Store near you.

Well if there's no apple store near you, I think you should use a friend's computer to create a bootable OS X Install USB flash drive.

The steps to install OS X using a USB are here : http://www.techrepublic.com/blog/apple-in-the-enterprise/how-to-create-a-bootable-usb-to-install-os-x/