We need you provide the purchase-code to verify that you are our customer and with us customer is King. Please follow the link bellow to know how to get purchase-code.
Step 1: Go to Item which you have bought on https://codecanyon.net/ or https://themeforest.net/
Step 2: Go to Tab "Support":
Or your can go to this to see video how o get purchase code https://help.market.envato.com/hc/en-us/articles/202822600-Where-Is-My-Purchase-Code-
We have a detailed article on how to install Arkahost theme and WHMCS, you can go to the following link to see details http://arkahost.com/documentation/
If you have problem please open a ticket. Our support will help you. Thank you!