Hello Gadouxoac64
May we refer to the answer provided here?
https://community.sbbswiss.org/d/25864-urgent-non-receipt-of-train-tickets-after-/4
Please kindly note in addition:
Although officially not required, we the SBB Community team, do suggest creating an SBB customer account before purchasing online tickets. By doing so, you cannot only see all tickets in your account, but you can also cancel them (if the fare allows the cancellation).
Kind regards,
Roland