TeenSafe — free trial is not free

Infuriated. Why say that your trial is free, but charge anyway? Is it in advance or what? How can you be sure that I will continue using your service? Or you charge money because no one wants to use it? What's the right answer?
I sent them several emails hoping to find it out, but unfortunately, I was ignored. Well, no wonder at all. I think I was scammed.
Be careful and don't use their free trial.