Please stop this people from debiting my account.

This so called I dream rewards has been debiting money from my account every month for a period of a year now. Who are this people and how can I stop them from collecting money from my account. Whenever I try to reverse the money, I'm directed to communicate with the service providers and there are no contact numbers appearing on their website even after searching on several occasions. May you kindly help me get this *****sters out of my life.