The problem is that you have no proof
that it was age discrimination. I'm not saying
this isn't what it is, but being able to document
it is the only way to rectify it.
try reaching out to the Older
Woman's League or
Panthers; both work with older
women and thus might have some instincts about
how age discrimination has been handled in the
past when it wasn't formalized. You are probably
a bit younger than their average constituent,
but they should have the information regardless.