Is transunionmonitoring.com Safe?

This is a TransUnion credit-reporting agency that is suppose to protect you from identity thief. They sent me two emails alerting me that have been changes to my credit report but they don't tell you what the changes are and when you log onto their site to view your credit report it doesn't show the changes either. When you call them they ask for your social security number, date of birth, home address, telephone number; all the information needed to steal your identity. How do we know if the person on the other the end is whom they say they are? Their employees speak English poorly and are hard to understand. It’s a worthless credit monitoring site and useless customer service. Don't waste your money and time.