Microsoft — Defective piece of Microsoft lumia 525

Address:

Agra, Uttar Pradesh

Respected sir I purchase the new Microsoft lumia 525. that piece is defective in which cut on display when i change the mobile to the service center they said you go to the shop where you purchase. When i go there the seller said that the mobile being replace in 7 days but today 8 days complete when I call the seller said ( ki company change kab karke degi koi pata nahi ) that I do not time of your mobile change. I want registered complain seller, Microsoft.