Vodafone India — activation of mobile number [protected]

Address:

Mumbai City, Maharashtra, 400016

My name is Sulabha Bhagat. I have been living in USA since last two years. Due to low usage and low balance my India number [protected] has been deactivated and disconnected from the service. I called customer care about the same but they told me to contact Tata Docomo as this number was ported from Tata Docomo to Vodafone.
When I called customer care of Tata Docomo he told me to call Vodafone as I am no more the customer of Tata Docomo and is not in service.
Can you please help in this matter and get this number activated as this number is registered in various important banking services and to receive OTPs.

Regards,
Sulabha Bhagat