TATA Docomo Helpline:
I have seen in many places where the Tata Docomo Customers don’t know customer care number.You can reach the Tata Docomo voice Customer Support by calling 121 from your mobile phone.This number applies to all tata docomo customers in India and of-course it is Toll-Free.
Tata Docomo Email Helpline:
You can get the customer support from them by sending an Email to email@example.com
This email customer support is common for all states.I request you to kindly include your Mobile Number when you send the mail.
Tata Docomo Live Chat Support:
Tata Docomo has Web-based live chat customer Helpline.If you have complaints or any other queries you may contact the tata docomo customer care by going here http://c1web1.saas.talismaonline.com/chatc1/tatadocomo.html
This live chat support may help you if you want to contact them on Peak hours.I would recommend it instead of sending an mail to them.