not able to install tech demo smart mag theme on my wordpress

i want tech smartmag theme but downloaded and installing via cpanel it showing the classic theme of smartmag .
i want to install only tech smartmag theme on my wordpress website
site name:
while uploading via wordpress it showing the error (are you sure want to do this? faild)

Not totally sure I follow exactly your issue but if it is just installing the theme that you want to do then “Are you sure…” is a hosting issue - install the theme via FTP and it should work.