The telephone takes away a lot of embarrassment. This does sometimes happen. As long as you can attend at least six of the eight sessions you won't lose the thread. Whether you were on the line or not, you will receive any written material that the group receives. You may also receive a summary of the session to help you stay motivated.
Some groups also form email groups among themselves for support between telephone sessions.
Your DietCoach Associate leading your group should give you her telephone number for you to call should you have a question between telephone classes. You will also have her email address. You group will also be asked if they wish to form an email group for the duration of the course and beyond. You fellow telephone classmates will also provide tremendous support as they're all in the same boat. Yes there will be every opportunity each week for you to get help with your personal dieting difficulties.