If you have not received coins for a completed OfferToro task and 48 hours have already passed, you will need to send them a request directly from your account.
How to contact OfferToro from the website:
Click "My "Credits link;
Use "Missing credits?" link to send them a request.
Make sure you enter your correct email address, as they may contact you for details or a reply.
How to contact OfferToro from the Android app:
If you can't find these links in your account, please email them directly at support@offertoro.com.
Make sure to include the following information in your email:
Your id in the OfferToro system (if you're using a web version). You can find it if you go to section OfferToro and open the section My Coins;
The name of the offer that you have completed;
Be sure to attach screenshots to prove you completed the offer.
It may take some time for you to get a response. If you still haven't received a reply, please see the article Offerwall didn't Answer My Request.