Sorry to hear about the inconvenience. Kindly, please share your Site WP-ADMIN Login details in the Private Content field so that we can check this concern on your Site and help you out accordingly.
I have found that you are using the custom layout for the shop page. Please edit that layout from Layouts >> Product archive layouts >> Edit the Product Archive layout in Elementor >> then edit the widget and change the title: https://ibb.co/gFHWn0rS