my running cell number has directely without information close by Airtel

Location/place: Pune (Maharashtra)

sir,

my cell no.9960996874(Airtel)and i have use this no.from last 6 year.
my complaint is- from last week(17/10/2012) my no. without information closed from airtel. i have submit request in Airtel gallery regarding start my no. but still not any response from airtel.
please solve my problem.
my alternet no is- 9595151100
E mail- [email protected]