If you have completed a Task in time and have met all the requirements, you can remain calm. You'll get your fee, since this money has been reserved at the Buyer's balance. For starters, try contacting the Buyer in the Task chat and find out, why has the delay occurred. If the Buyer if offline, your message will be delivered to their email. If you won't be able to obtain result checking for a long time, you can send the Task to the Dispute Department.