To contact RevU regarding an issue with an Offer hosted on their Offerwall, go to the Freecash Earn page here, scroll down to “Offer Partners” and open up their Offerwall. You can also open their Offerwall by clicking here.
Next, click the Headset icon at the top right to access their support tab - from here you can choose the specific offer you had issues with and follow the instructions to contact them about it accordingly:
For general inquiries, you can reach RevU via their general Support email: [email protected]