Comment by chrisandchris

For example, in Switzerland you cannot cancel your landline or mobile phone subscription (at the two largest providers) without calling or chatting to customer support. They excluded "cancellation by mail/e-mail" explicitly in their terms of use.

I recently tried to cancel my landline and first they told me I could only cancel within 1 to 3 months up to the expiration, not earlier (which is clearly against any existing law).