Airtel Mobiles
Bill paid twice

I was Using airtel mobile postpaid number 9600008037. this is company CUG number.

i resigned from that company so i disconnected the mobile connection.

but i paid the last bill before disconnect. At the same time my uncle also paid the bill.

so the bill paid two times.

regarding this i complained to customer care they told they will refund through cheque with in 60days.

but almost one year finished still i am not getting the money so please tell me the proper proceure to do legally through court.

Thank You

Jai Prakash