Can’t work with plugin

The documentation is quite complete on this subject.

You must for each gateway, allow the plugin. Procedure here: https://github.com/rvola/woo-cancel-abandoned-order/wiki/Add-a-new-gateway

Then set for each gateway in Woocommerce settings, the following setting:
Fashion: hourly
Time: 2 hours

By default the plugin will cancel the commands “on-hold”, if however you want to cancel another status, the documentation explains it here: https://github.com/rvola/woo-cancel-abandoned-order/wiki/ Change-the-status-type-for-the-cancellation-process

Good luck