Flipkart - Defective phone is not taken back yet

We booked Nokia *•*+ on September ** of order number OD****************** We received a defected one thus applied for a return on September **th• still we are getting messages regarding the return dates but no one Is here till now and the product is still with us•firstly the date was confirmed on September **nd then with no information they itself recharted the date to another one and the last date they informed was october *th•today it is **th and it's been a month• it is such an insult from such a renowned firm like flipkart•we are completely disappointed and annoyed by their customer service"• the thing which triggered as the most is that,the same item is in their big billion days with **** rupees off . Hope the authorities find it as an important message and will do the procedures as soon as possible .