Flipkart — Poor service and not accepting return of faulty product

Address:	Mumbai City, Maharashtra
Website:	Flipkart

Order ID OD[protected] for Sennheiser PMX 60 Wired Headphones.

On delivery, I found that the product was not working correctly. The left output/ear of the headphone was not working. So I requested a return of the product on September 10th. Pickup date for the same was set to be September 12th. Return ID : 29289537.
On 10, 11, 12, 14 & 15 september, I received text message that the return would be done before 7pm on that day. Everyday later in the evening another message received was that the pickup of the item couldn't be completed.

I called up customer care. They told me that the return had to be effected within 10 days for any refund

Now I don't understand how even when :
1. The product was defective
2. I requested a return within a day of delivery
3. Flipkart failed to pickup the product.

They are blaming me of not communicating further.

Pathetic service by flipkart and customer care if manned by who don't understand the issue at all.