wuts hppinin?

Well, they are here undercover on the mission to find out who Rashi is so they can protect her.
Shikha decided to get Abhi back so she hired a goon to injure sameera during Abhi-sam engagement. So she could go instead of sameera on the mission.

Samrat is gone for few days and now sameera is back in college to continue the mission.

About their hair, the wigs have come off. This is the original hair of shikha and sameera and how they look in real life.

I hope that answered all your questions