You might be contacted by a contributor who wants to re-do a submitted survey. You can only restart a survey for participants who have already completed and submitted the survey.
Step 1. Go to surveys
Click the menu icon on the top left of your screen and click Surveys in the main menu.
Step 2. Select open
Select Open in the Status drop-down.
Step 3. Choose edit
Click the survey name to edit it.
Step 4. Find the contributor
Scroll to the Contributors table and find the user you want to restart.
Step 5. Choose Restart
Point to the participant 3-dot icon and choose Restart.