Aircel — the unspent balance of aircel account has not been refunded

Address:

600094

I could not change my mobile service provider from aircel to other services due to which my aircel number remains without any use.
Adding to this the unspent balance from aircel account has not been refunded nor has any initiative been taken.
Please resolve the two issues as early as possible. I still have my aircel sim kept safe incase the service provider can be changed.