What can be done with termination of medial insurance?

My insurance was cancelled for premium non-payment. I had a partial payment of $70 (changes in my premiums due to Medicare coverage) due in November 2012, and I received a call reminding me of the payment and told the customer rep I would add the partial to my December payment of ($260). I sent in my payment sometime around December 17, 2013, and when returning back in the USA Jan 2, I had a letter from the health care provider my insurance was cancelled by the insurance company. At no time did I ever receive any notification that my insurance was going to be cancelled for nonpayment either verbally or in writing ever receive any notification that my insurance was going to be cancelled. And this insurance was cancelled in spite of telling the customer rep on Dec 10, 2012 that I would put that $70 payment in my December bill. Did I have a contract with my insurance carrier and were they obligated to tell me in advance that my insurance was going to be cancelled for non-payment of the partial amount I owed from November. Only when I called the provide was I told that they had terminated my insurance for not paying the partial amount of $70 owed in November.