Paytm — got defective nexus 5 black 16 gb

Address:

New Delhi, Delhi

I ordered nexus 5 black 16 gb on 3 jan 2015 and got it delivered on 6 jan 2015 But after opening the box i found that nexus 5 is defective as its one speaker is not working...please either change the product or refund my amount... My order no.[protected] My contact no. [protected]