How to hide or change ‘ARCHIVE’ text in blog posts overview page

Hi, I'd like to get rid of the 'ARCHIVE' text that's in the header of the blog posts overview page and get rid of 'CATEGORY: XXXXX' in the header of specific news category page. I have tried with this page: https://www.afc.fm/category/news/ Also with this one, linking the menu to one particular news/blog category. https://www.afc.fm/news/ (default posts page) Please advice. Thanks!