Employer changed deductible on co. health ins. policy and did not update employee handbook or notify employees. (w/co. 12+yrs)

Dealing with health issue that will req. correction with a surgical procedure within next 5-6 weeks. Have kept employer updated through all dr. visits. Informed owner of required surgery and would be scheduling soon. Next day was revealed that company had made a change to our ins. policy that raised the deductible almost 100% and responsibility of employee pay out of pocket with it. Also told that in next year, the company portion of paying deductible would most likely be a ceasing 'benefit.' Critical detail is that the Company Employee Handbook was not updated to reflect this change in insurance nor was any employee even notified of this change. Been 10+ months since change and looking at a potentially larger medical bill due to "dropping of the ball." In utter disbelief of situation