registered for a meeting but wish to no longer be harassed and receive emails and reminders

Hello I registered for an event, then the person constantly changes the event and I am constantly notified of this but there is no unsubscribe option is there a way to cancel my registration? I tried signing up for it again and cancelling but I am not sure that the zoom system is intelligent to stop harassing me in this manner. I figure they would have sent me two emails and now they will just continue to send me 1 email every week is there any way to stop it?