Sometimes it takes time. I got credits within 2 days for my first 2 blogs. But it took some time ( a week) to get the credit fr my last blog. If its more than a week now, then you can mail to firstname.lastname@example.org
Thank you so much guys for your help! I received my credits. actually it takes at least 2 WORKING DAYS for them to update the credits and I posted on the weekends for which was credited later on Monday.