When you joined the IDF, you agreed to a recurring membership for which you'll be charged $ 30,- per year. You are free to cancel your membership whenever you want.
How you can do this depends on one thing: did you join the IDF on the "old" site or on this site?
If you joined on this site, all you need to do is go to your profile page and click the cancel button there.
If you registered through the 'old' site then you need to follow these steps:
- Go to Paypal and log in
- Click the options wheel in the right hand corner
- Click payments
- Click pre-approved payments
- Cancel it there