If you requested to redeem NRVE points, but changed your mind, you can cancel the request right up until the points have been fully processed for NRVE.
To stop a redemption go into Your Profile and to the Rewards tab. On the Rewards tab click the Transactions tab. On the Transactions list you'll see the redemption in process.
Click on Cancel next to Pending note.
If Cancel is not viewable, but the transaction still says "Pending" that means it is too late and the NRVE is being sent through the blockchain to your wallet.