Tata Docomo — I want to reactivate my old number

Address:

530044

Sir/madam please help me out. My sim card has been deactivated because i was not using that sim from last 1 year now i want to reactivate that number because my bank account and many ligeal documents is linked to my old number only i am facing lot of problems.
Please help me out i am not abale to apply for my insurance also realy its too difficult to make me all those things you people are only the hope for me please help me out it is too important for me please try to understand my problem and help these poor guy