If you are certain that you are using a supported device, then you may not have the most recent version of the SHOWTIME app (not the SHOWTIME Anytime app) on that device. Follow the instructions for your device to download or update to the most recent version of the SHOWTIME app.
If you have the most recent version of the SHOWTIME app for your device and you still do not see the PPV event, check your device generation or model. The SHOWTIME app on older Apple TV and Roku devices does not support PPV.
See our list of supported devices here.