My question involves insurance law for the state of: california


I had surgery on 11/15/2007 took of two week off do to surgery. Didn’t return to work gave my resignation On Jan, 2008 and now I started to received bill of 19, 000.00 from insurance
I called the insurance they told me that they received a call on 12/2007 from Company to cancel my benefits from11/2007 when I was still working there can’t they actually do that?