"
ja'o ko dunda mi"
I don't think ja'o really fits here. I think you really want ".i se ni'i bo" or ".i se ki'u bo" (or if you prefer, "ni'i/ki'u lo du'u go'i kei ko dunda mi") If I can't pay you for her, therefore give her to me. I'm not sure what an evidential would mean in an imperative sentence. Consider, could you put e.g. "ti'e" there? What would mean? Also, "mi" should be the te dunda, not the se dunda.
--gejyspa