Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Either your phone is defective and should be returned ASAP as such, for an exchange for a new phone that *works*... or else, it needs to be registered (basically) in order to make calls and receive calls.
As for how to cancel this... you just let it go. Or contact Customer Support at JustAnswer.com:
Thank you for asking your question here at JustAnswer.