That's unfortunate. Nobody likes to feel cheated at work.
I'd suggest to try and remediate the situation first. Try to cancel the insurance and get your money back if possible.
If that doesn't work and working there isn't that great anymore (no friends, not learning much, career dead-end, no perspective of higher salary, etc).. I would look for another job if I could afford that financially.
In big corporations, as much as your boss may like you and the work you do, his/her hands might be tied: no leverage with HR, they have a "problem" to deal with, since official channels have been used to complain.. now that might be making him/her look bad to other higher ups, etc.
I'd suggest to try and remediate the situation first. Try to cancel the insurance and get your money back if possible.
If that doesn't work and working there isn't that great anymore (no friends, not learning much, career dead-end, no perspective of higher salary, etc).. I would look for another job if I could afford that financially.
In big corporations, as much as your boss may like you and the work you do, his/her hands might be tied: no leverage with HR, they have a "problem" to deal with, since official channels have been used to complain.. now that might be making him/her look bad to other higher ups, etc.
Best of luck.