Myntra.com — Myntra denies to refund money of product which I have not received

I have ordered fossil watch 2 days back and parcel arrived with only bill inside not watch . I called customer care they told me to wait 24-48 hours until they check with package, then next day message came it says they checked everything and seems proper so they refuse to refund me money . Also ask me if I have video of opening the package, which I don’t have because I trust app . Why they don’t show me video while packing my things . They don’t have any proof so do I . Very disappointing.