I receive my review credit as soon as my review has been approved. I've never had a problem with that. I would contact staff, either your local moderator or the webmaster and tell them about your problem. I'm sure it was just an oversight. However I see your reviews were in August and the credit you would have received for them would be used up by now. However that would suck if that credit burned up at the same time as your paid membership was in effect.
I won't quit until your legs are shaking and the neighbors know my name!