Facebook £30 Coupon Credit Scam

ANOTHER scam, this time from Facebook! They show you an ad which says "Get £30 worth of free Facebook ads - click here" or words to that effect, but when you click through and set up the ad.. it just bills you full price. So no free credit or coupon- just a way for Facebook to con you out of your money.

Theres some specific process you have to follow the first time you see this scam otherwise they won't honour it. How do they get away this this scamming?!?!

People complaining here: https://m.facebook.com/business/help/community/question/?id=10212945001570644

and here

https://m.facebook.com/business/help/community/question/?id=10103936850626710