Younger people will often be paying more for health insurance in 2016. All the compulsory basic insurance premium levels are approved by the Swiss government, the Bundesrat & FINMA. You have until nearly the 27th of November to send a registered letter and cancel the Casamed policy for 2016.
I am very happy with the Visana "Managed Care" HMO scheme
, but do search for your suitable policy https://en.comparis.ch/krankenkassen/modelcheck/entryarea
Be wary of insurance companies offering very cheap policies, they sometimes save money by employing fewer staff, which result in very long waiting for refunds etc.
My compulsory insurance (KVG) has increased from Fr 318.20 to Fr 329.20 (increase is Fr 11.00 or +3.4%
My supplementary insurance (VVG) decreases from Fr 61.70 to Fr 52.20 (decrease is Fr 9.50 or -15.4%