The categories can be removed via Appearance -> Widgets -> remove the categories widget from the main widget area. Then check back your site after completely clearing the browser cache.
If you have any questions feel free to contact us.
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.
Hi for this i want to check it first before i need you to assist me as its good to learn and try and do it myself. If a problem shall revert back on this thread.
Regards