Hello Nickybox2,
Thank you for using Apple Support Communities!
First I would make sure you have a supported version of iTunes for iTunes Match:
iTunes Match minimum system requirements:
iTunes 10.5.1 or later on your Mac or PC
From: iTunes Store: Subscribing to iTunes Match
http://support.apple.com/kb/HT4914
If so, then next I would make sure you are going to the correct Store section. It is located in the menu bar where you also see File, Edit, View, etc. If you cannot see this bar then you can use this info to see it, and click Store>Turn On iTunes Match
From: iTunes: Turning on iTunes menus in Windows 8 and 7
http://support.apple.com/kb/HT5610
Take care,
Sterling