This action runs when a user does the payment complete.
do_action('profilegrid_payment_complete',$gid,$user_id);
Simple example
function profile_magic_action_on_payment_complete($gid,$user_id) { //do something with the user id and group id when a user membership request is denied. } add_action( 'profilegrid_payment_complete', 'profile_magic_action_on_payment_complete');