How do we install "themeforest-6476251-stylemagazine-wordpress-theme-wordpress_theme" on o

We have recently purchase "themeforest-6476251-stylemagazine-wordpress-theme-wordpress_theme". We have tried to install it several times, following all available instructions online, yet without success. Could you please tell us the necessary steps that we need to take to install the above theme?

Thanks in advance,

Sociolingua.