Tata Docomo — reactivate my docomo number

Address:

Tirunelveli, Tamil Nadu, 627004

Sir/madam,
I have been using network for the past 7 years. My mobile number was suddenly deactivated without prior information (As i did not recharged for 3 months) eventhough i was receiving incoming calls. As per trai rules your network must not deactivate a number while it is receiving call and even if you must provide a grace period of 15 days a per the rule. I want reactivate my number as it is used in all my official works.