Hello,
Thanks for using our theme and for contacting us.
“Refresh this page and it lets you scroll across to blank space on mobile devices.” – Do you use the latest version of the theme? To check it go to Appearance > Themes > Theme details about XStore parent theme – https://prnt.sc/_vWjB28Pc1gN If your version is 8.3.1, download sidebarCanvas.min.js file from this page https://dropmefiles.com.ua/en/BR6XQwTD and re-upload it into xstore/js/modules folder via FTP. Clear cache and check the result.
“The CSS in the customisation panel doesnt work.” – do you mean code was added in Theme options > Theme custom CSS? Provide an example of such code and temporary wp-admin access, so we can take a closer look.
wp-admin access: Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
“as kept duplicating the logo” – Provide a screenshot of the problem. As I can see, there is 1 logo image – https://prnt.sc/aRaH7bUQbhZR
You can use Lightshot screenshot or Gyazo tool to make screenshot and share the link here.
Regards