I am having problems with the login and am using the Post customer login or SwissID. Who can help me?

For questions regarding the Post customer login or SwissID in particular, for the username and password reset, please contact the Post Contact Center:

+41 848 888 888

CHF 0.08/min. from the Swiss fixed line network

Kundendienst@post.ch 

Or the SwissID team

Tel. +41 848 99 88 00
E-mail: support@swissid.ch

https://www.swissid.ch/faq.html