Hello,
Yes, please provide temporary wp-admin and FTP access, so we can take a closer look at the situation on your site.
Also, provide screenshots of where exactly you added the code and where exactly you see/test the fonts.
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.
ftp access: If you do not know how to create FTP contact with your hosting provider, they will help you.
Regards