Tata Docomo — migration of cdma number into gsm walky no.6450959

Dear sir,
Since there is no service store in sanjay place agra. I am failure to get my walky no 6450959 into gsm as out going facility is discontinued thou my bill payment is upto date.
In view of the above please suggest me how to over come problem. I f no reply is received i would have to discontinue this phone and will have some other telly services.
So please do the needfull and reply soon.
Your's sincerely
Rajiv anand
A/c no.[protected]
E. Mail id [protected]@gmail.com