Shyamu is the culprit

After watching today, I am sure its Shyamu, our favorite villian. When Anjali starts talking to Akash about calling Police and informing them about Arnav's disappearance, Shyamu disappears from the scene.

What you said is hundred percent true. That creep along with his henchman is behind the kidnapping.

dont know if he is the kidnapper, but he is involved!