More information about the Sony PS5 can be found here:
https://blog.playstation.com/2020/11/09/ps5-the-ultimate-faq/(opens in new tab)

Can I return or cancel a purchased PS5 console?
You can find instructions and refund guidelines on Swisscom’s Order, deliveries & returns page. All devices purchased from Swisscom are subject to a 14-day right of return and a 24-month statutory warranty.

What should I do if my console is defective or needs to be repaired?
Support for the PS5 is provided directly by Sony. In the event of a defect or if you would like any information on the guarantee, please contact Sony Switzerland’s technical support directly by phone at +41-31-528 02 76, by e-mail at service@ch.playstation.com or via web support(opens in new tab). Swisscom cannot provide support and does not assume any warranty or guarantee for the PlayStation®5.