Olx India — vivo v9 fraud

Address:

Shimla, Himachal Pradesh, 171011

I am from Shimla yesterday I see add in olx of Vivo v9 I call seller he saw I am army man and I am from Delhi I send phone by courier first half payment done I send 4500 by Paytm yesterday and today he call me courier phunch gya h ap payment puri ke do mne kr de and both phone number of seller switch off sir what can I do my 9000 sir kya Kru sir m court m case or drugs apki company p