https://www.desidime.com/discussions/envie-charger-service-center?page=1#post_1362127
They don’t have any service centre. You will have to send the defective product to their office in Rohini, Delhi.
http://www.imsmercantiles.in/catalog/contact_…hp
PS- I had couriered defective rechargeable batteries for replacement under warranty, 1 month ago… I haven’t received any response.