I'm sorry this happened to you and you was taken in by this breeder.
She is a little darling though and if you love her.....does it really matter
I love my girl and can't imagine parting with her, it wouldn't matter if she was mixed or not. Zhoie isn't the standard silky coat yorkie (as they should be) she is a cotton coat, but she is the light of my life, the joy in my heart, the spark to my fire (ok you get the idea) LOL
Many have mixed babies and we love them all, with all our hearts!