If you need to contact RealtyTrac to cancel your 7-day free trial, you can find their contact information at the link below.
I'm not sure of your question. Were you considering enrolling in the 7 day free trial with Realtytrac? If so, make sure you cancel before the 7th day or they will in fact charge your credit card.
Hope that helps. If that was not your question, please rephrase your question and we will try to help you.
Prudential NJ Properties