Facebook warning!

A year ago it happened to me but i didn't realise because it was well hidden but now that i have an banking online i found that facebook has been taking the odd £5 out of my bank account for something i bought over a year ago. On my statement it was under paypal long story short all the games and activities on facebook never buy anything off of them because they keep it open!
https://www.facebook.com/topic.php?uid=2373072738&topic=68669

i never click on anything on facebook these well only thing i know is safe!

i'm hoping google + is better