The below is the address of authorised collection point -
TVS Electronics Ltd.
Shop No. 1B-62, Phoenix Paragon Plaza, 1st Floor, LBS Marg, Kurla (West)
TVS Electronics Ltd.
Shop No. 204, 2nd Floor, 46, Kothari Milestone, S.V. Road, Near Shiv Mandir, Malad (West)
V Care Telecom Services
New Excelsior Cinema Building, Backside Wallace Road, Ground Floor, V T
V Care It Services & Solutions Pvt Ltd
F 1, Prime Mall, Irla Lane, Vile Parle (West)
Tech Biz
309, Apple Plaza, 3rd Floor, Behind Kohinoor Technical Institute, Dadar (West)
S.G. Infotech
2 A, Thakkar Shopping Mall, 2nd Floor, S V Road, Opp. Borivali Station, Borivali (West)
If you want the address of walk-in repair point, it's only available in Mumbai.
Refer below web-address for the details.