online shopping scam

once I ordered a black bodycon dress of rs 1300 in cod from myntra. without any prior notice one delivery guy came whose contact number was showing amazon delivery( i thought amazon is the courier partner) to deliver even in app it was not showing out for delivery so I thought it was a app glitch i paid the money and even checked my name and address on the box it was correct and opened after I went to my room i found a worn out saree and no invoice which is imp for return purposes I tried everything even contact myntra nothing happened. in conclusion i would say never receive any parcel if in app no out for delivery shown they may call it a app glitch still don't receive it if they force cancel it then and there