Hello

We are using CRON JOB on hourly base to expire ads and send email notification.

If your ads are not expired after due date then you must need to contact with your hosting support.

Because on some hosting servers corn job is disabled by default. Like (One.com) is not support Cron Job. So We never recommend One.com Hosting Company.

So you need to contact with your hosting support and ask then to allow CRON JOB.

And for same time you can try this.

Edit your wp-config.php and add this code.

define('ALTERNATE_WP_CRON', true);

We hope after to add this code your cron job will work, But if there will be still any problem then you need to contact with hosting support.

Thanks