You are able to adjust your answers on surveys and instant polls.
Please go to the site and login.
At the topic where you have submitted your selections, you'll see a message that thanks you for completing the topic.
If you have difficulty finding the topic, click your display name (or the Gear Icon), and click "View Profile", you view your recent activity and links to the topics and ideas you have contributed on.
Click on "Change Your Vote” this should reopen the survey and allow to adjust your answers.
When ready, click the submit button once again.
Feel free to add a comment at the bottom of the page.