Hi Nicole-Edelweis
Since you’ve already called us and still haven’t got a solution, my personal advice to you is: as soon as you’re in Switzerland, maybe already at the airport, go to a counter with a passport photo of yours (a physical one or a digital one on your smartphone) and buy your GA Card for one month.
The SBB staff at the counter will ask you for your Swisspass, you’ll answer that you don’t have one yet.
He or she will hand you a provisional GA Card on paper with your customer number on it, in order for you to be able to start travelling.
Your red SwissPass card will be sent to you by post just a few days later.
This is always the easiest and quickest way.
Take a look here on the SwissPass photo requirements, because that’s very important.
I wish you a good time in Switzerland. Have a nice day. EllenvS.