I can't find the page where I can stop my goody bag from recurring. It just links me to the airtime top up page. Cheers!
Here is the link you need - http://community.giffgaff.com/t5/Using-giffgaff/How-can-I-change-my-recurring-goodybag/ta-p/5130398#...
Scroll down and there is a section on how to cancel your recurring goodybag.