If you have not received coins for a completed task and have sent a request to the offerwall, you will have to wait.
Unfortunately, most of the offerwalls process requests within 14 days. This means that you will have to wait for your request to be processed. In most cases, they will give you a response sooner.
However, if you still haven't heard back from them and 14 days have passed, please be sure to contact our Support team. We will try to work out how to help you in this situation.