Only admin users can undo a reward. These instructions use the admin panel, which is an older portion of LiveSchool that we're working to fully incorporate into the app you use every day.
Steps to Refund a Reward
Go to the admin panel
Log in with your existing username and password
Choose Transactions - You'll see all of the points and rewards recorded in your school
Search for the student who needs the reward refunded
Click the red X next to the reward. This will delete the record and refund the points