It seamed that I could trust the company with my information. But since I didn't use their service. I decided to cancel before the trial ended. I tried so but it was difficult. First, there's no option to delete your credit card information, so most likely I guess I'll be charged for one month, which then I'll have to call my back for a refund and explain. Also, when I wrote to support, they wrote this back:
"I can help you with this!
But first, could you help me by answering these questions:
What made you decide to discontinue the service? Were we lacking something?
What was your initial goal when you signed up for the tool?
Answering the questions above would help us better the tool and our service :)"
There might be a good intention behind this email, but I just find it annoying and disrespectful that my cancellation is being conditioned to a questionnaire, and that there's no delete my credit card button, nor is there a direct way to cancel.
Just be careful with them.