have done it about 10 times and no credit (well not sure on last one yet but not on other 9).
Did you fill out all the information your name their name emails, the word thing at the bottom?
I did this one on another site. It credited for me but i guess i can't do the offer on this site now. It says service unavailable when i click on the offer.
Try refreshing the page, or clicking again, sorry you're having that problem
I did try it I am not sure if it went threw, how can you tell if you did the offer and or if the offer went threw I am new really new.
If you did it all correctly then you should get an email, if you don't go to account and it will list the offers that you have been credited for, hope i helped!