dear sister sakeena,
to activate your account, log into facebook go to the top right hand corner and click "account" and when options drop down go the "account settings" it should be the 2nd option...then simply select any of them options as to why u want to deactivate your account make it up if u want lol they cant force you to stay... then simply click "deactivate my account" then u will have to type your password u use to log into facebuk and you will go through a security check (typing 2 words into a box as you see them) and inshallah it should be done!
Hope this helps sister
Much love *!*!*!