Vistara — Baggage not delivered

After being harassed by Vistara staff members in front of other passengers in Hyderabad, and after paying overweight baggage fees, the baggage did not arrive in Delhi. I needed to continue my flight internationally, but after 4 days and many attempts to request my baggage being sent, all the Vistara people say is they will call me back and they never call me. When I call back they don't pick up my phone calls. I'm stuck in a foreign country without my suitcase and no idea if I will ever receive it.