I received the email as stated below:
Thank you again for visiting Italiarail.co.uk. Trains are one of the best ways to see Italy and we'd like to help you with your reservations or answer any questions you may have.
Please contact us at 8773757245 and reference order ITR169673 if you would like to confirm this reservation.
Please note that prices and seat availability are not guaranteed until your reservations are confirmed. If prices have changed, our agents can assist booking at the new fares, or can help you find low prices on alternate trains.
I have tried to call the number of 8773757245 to confirm my reservation but the number was invalid. Emailed the firstname.lastname@example.org but no reply received. How am I going to confirm my reservation if both contact ways not working?