@“x”#1366981Everything you need to know about canceling your subscription can be found here, so you can arrange a callback, or otherwise you can call the hotline directly 0800 800800:
Cancel or suspend subscription – Help | Swisscom
Contract details (minimum contract duration/cancellation period) can be found in MySwisscom.
https://www.swisscom.ch/myswisscom/d?useCase=changeMobileSubscription
This is a customer help costumers community. We are a customer like you and have no access to your contract details