If you are talking about notifications from the feedback forum, try clicking on your picture in upper right corner and look for a menu like this: (If you are talking about something else, please be very specific)
Me too and I want to unsubcribe but can't find it on your site.
Please post in here an example of the email you received, so our support can understand why there is no unsubscribe link and can help you unsubscribe.
I just don’t want the topic feedback
Customer support service by UserEcho