Kasam Seh - strange happenings

Most Hindi serials use 2-3 tactics to get rid of their top stars, or to spice up the show. So, the serial could either get characters to do a plastic surgery so that their face is completely changed (helpful when you want to get a new actor in), or they get a good person to suddenly become bad (helpful to give a twist to the story), or they make time fly past and bring in a change of 15-20 years (people change, but otherwise, the house, the cars, everything else looks exactly the same). All of these strategies have been employed in this popular serial from Zee.
Appearing weekdays at 9 PM, the serial tells the story of 3 sisters, Bani, Piya, and Rano; The story though primarily is that of Bani and her life. After the departure of Prachi from the lead role, the serial had to bring in a new face for the lead role of Bani. And so they bring in the plastic surgery for the new face, and give her the name of Pronita. She is out to take revenge against Meera (initially shown to be good, then turned into evil). Meera has ruined the lives of all of Bani's children, and Pronita has to also try and help them out.
So, Pronita gets married to Mr. Walia (why he divorces Meera was not clear), and then has to face a lot of resistance from the other family members including her own kids. And who supports her ? Her old enemy - Jigyasa (very surprising). Right now Meera has got Krishan arrested for drugs smuggling, and Pronita was unable to prevent it.