Hide cancel subscription button on user dashboard in WooCommerce.

hide-cancel-subscription-button-on-user-dashboard.php

add_filter('wcs_view_subscription_actions', 'delay_user_action_cancel_button', 10, 3 );

function delay_user_action_cancel_button( $actions, $subscription, $user_id ) {
    // Check that 'cancel' action button is active
    if ( ! isset($actions['cancel']) ) return $actions;

    $start_date = $subscription->get_date('start'); // Get the start date
    $days_period = 15; // Here define the "designated time limit" in days

    if ( strtotime($start_date) + ( $days_period * DAY_IN_SECONDS ) >= time() ) {
        unset($actions['cancel']);
    }
    return $actions;
}