They would be in whatever platform you purchased to tickets.
If you bought them with an app, they would probably be in the app. If you bought them online, they would probably be emailed to you.
They clearly explain it to you after the purchase. You must download them to your phone and that is your ticket. They email you it to download. Then you must show them on your phone.
You could also try checking your email for a confirmation.
Thanks! Your answer is awaiting moderation.