@Caryl-Anne0: If you go into your message thread and cancel the guest's booking you will be penalized. Because this is instant book you are allowed to cancel a reservation if the guest is not following your house rules (and you indicate they aren't). However, you MUST call Airbnb to cancel if you do not want the penalties.
I am new to this but In my reading it says that if you are an 'instant book' there are no penalties for cancelling and you do not lose superhost status