Facebook Overcharges For Adverts!

We recently decided to try the Facebook advert option and we scrolled around and found two options that looked cost effective to start off with. We started the campaign and the first one was just an advert that we boosted and we stopped it as the bill kept on running. We luckily noticed this and stopped the advert. We then tried the Like boost. We got numerous Likes but I went through all the profiles and half of these people were homeless or jobless so how does this help me? In anyway, we then saw our bill would be R794 and we were happy with this. We were then debited with R6000. Now you cannot contact them or send them an email nothing. There help page just keeps on throwing you to the next page with questions and answers and you can say it does not help but still you get no where. Please be very careful before advertising on Facebook or if you can, stay away!