Hello Grahamlw
Please call our SBB Contact Center and give them the order numbers of your purchase. They will be able to find the tickets and send you an email.
The number is +41 848 44 66 88, CHF 0.08/min.
In the future I suggest you log in to buy tickets: this way you will always be able to find your tickets in your profile under “my orders”.
Regards
EleonoraS