Praise, smile, happy voice, play & get excited when she goes on the potty pad! Clean up the accidents but don't shame her.
Tatiana was an easy one to train! She loves to be praised and looks to me for praise and that "Good Girl" phrase! Even when she is outside and I tell her to "potty" she will look at me while she goes and then comes running for some praise & play.
I suggest you spend lots of quality time playing and praising her to get her to trust you. She sounds like she is getting fearful of you getting upset with her. She will bond with you once she knows you won't get upset if she has an accident. Good Luck!
