No joy on adding new dependents!

I've tried to get two more dependents on my current Saver plan for months but with no joy! It seems that Discovery Health is making so much money that they don't need new members! I've completed all their on-line forms and sent it to the customer services officers (with the necessary substantiating documents for at least one of the dependents, a foster child) and it became a backwards and forwards emailing but to no avail! Their customer service officer should be fired as their is no customer service! It is absolutely unacceptable on how they treat their customers with a no follow up and no care!