Hello curt
Welcome to the SBB Community!
Tickets cannot be amended, you have to request a refund and repurchase.
What is the issue with the name? Completely wrong?
It is not a Supersaver ticket or a Saver Day Pass, you could ask for a refund, just as mentioned here:
https://community.sbb.ch/d/36305-change-last-name/2
And please, saying hi when asking a question is appreciated, so is a descriptive subject; anyone here needs help.
Kind regards,
Roland