Excellent Support Ticket system plugin for WordPress

I have been using Support Candy plugin pro (Standard Bundle) for the last 2 years. I use it for an admissions portal for a trust institution running schools. The support system based on tickets works brilliantly. I use email piping and agent allocation plugins to route traffic. Although not documented, the plugin has numerous highly useful hooks that can be used to extend the plugin with my own code. Here is an example:

add_action(‘wpsc_set_change_status’, [$this, ‘action_on_ticket_status_changed’], 10,3);
Based on ticket status change, I can check the change from and to and trap the desired condition and execute my code.

The plugin own its own dies the job very reliably. I highly recommend this plugin. The support has been excellent. I get a reply to my ticket within 24h during business hours.