DTDC Courier & Cargo — change the item

My consignment no:h05371286
I bought a artificial jewellery item from a hyderabad seller and she sent it through dtdc courier but while on receiving the courier. The jewellery was replaced by some medicine and while i opened i realized that it has been changed. I tried calling them and resolving the issue but they re not at all helping me i this. The courier people are saying that they don't know where would it have been changed. Plz help me in this regard