1) you installed and enabled Infinite scroll and Ajax pagination plugin and did not use the correct selectors according to documentation https://xstore.helpscoutdocs.com/article/65-woocommerce-infinite-scroll-and-ajax-pagination-settings
So, go to Plugins and disable this plugin to get default pagination at the shop page. Also, check the plugins list and disable recommended (not required) plugins that you don’t really use (check documentation to find more information about plugins)
2) Infinite loading is enabled also for the blog page. Go to Theme Options > Blog > Blog layout > Navigation type.
