Reply to Get $50 in Free Advertising on Facebook

Like the title says, I received an email from facebook for a 50 buck coupon to use to promote my page about a month ago.
I didnt believe too much of it but then they kept emailing me with reminders about it, so two weeks ago I said ok Ill try it.
Fast forward to this week and I receive emails from facebook with receipts amounting to 50 bucks. n those 50 bucks have been charged on y checking account.

SO Im like wtf. I have emailed them about this but no response so far.

Anyone else in the same situation?