Your best bet really is just to get used to 8 - It's fine once you get your head around it.
As your laptop came with Windows 8 (Not Windows 8 Pro), you do not get the automatic downgrade rights to Windows 7, therefore you would need to purchase a full, retail copy (Not an OEM one) of Windows 7 which is both very expensive (Around $200) and very difficult to still find on sale now that Windows 8 is out.