Well I'll go with Chaands word.. As he is a vampy of his statements I believe him.
Abhay though he said after your vampy blood drains out you Will be Human but I didn't found any blood getting drained out after the Ritual.
Pia possess Vampy Blood in her RNA n DNA.. That has been mixed wellthis means tat Pia can still become Vampy,but on right time n tat time she'll choose.
Even I was thinking the same. Even they didn't show us how Abhay saved her. Wish we'll get answers soon.