[gemy]

They will take your complaint seriously. THey will launch an investigation, based on your documentation, which should include all your emails etc. And most especially the scathing email she sent to you.....

If you documented manually the dates of your phone calls with the breeder and did a brief synopsis of what was told verbally to you, that will also become part of the record.

I do think it is worth your time.

But perhaps now that you know this breeder has joined this forum, she might be more interested in coming to an arrangement that is more agreeable to you.
So in closing, you need to determine what is the best outcome you want.