To contact AdscendMedia regarding an issue with an Offer hosted on their Offerwall, go to the Prizebear Lobby page here, scroll down to “Offer Partners” and open up their Offerwall. Next, click the "Support" button at the top right - from there, click the "Offer History" tab and select the "Missing Points?" option for the affected offer.
You can use the link below to contact them with any other general inquiries: