Notifications don't work for me. Search "Reddit Mercari notifications" to see (a) problems that others (not just me) are having and (b) this has been going on for years and (c) Mercari customer service don't help. Buyers are frustrated as they expect me to respond timely. I'm frustrated as a seller as I have to check the app constantly. And yes, I've reinstalled the app, turned on all notifications, cleared cache, rebooted my phone.