Apple India — IPhone customer care

Address: Varanasi, Uttar Pradesh, 221001

I have buyed Iphone 5c last year and due some some technical fault after a year i submitted the phone to apple service centre, after 7 days of submission they called me today that they will be replacing it with new phone and asking for full price.
Also now the service centre is asking for 1600 extra to get the phone back as 1600 is there service charge .