Oh, that's no good!
Please make sure to check your spam folder and any other email address you might have used.
You can also create an account on www.busbud.com with the same email address that you used for your booking.
All your bookings, including previous tickets, will be available there :)
If you still can't find your ticket or if it's not available in your account on the mobile app, then please write to us on firstname.lastname@example.org and we'll make sure to get you your ticket pronto!