Aircel Postpaid — Mobile postpaid deposit not refunded.

Address:

Coimbatore, Tamil Nadu

Hi Team,

I have ported my number and discontinued from Aircel on Jun2016.
I called many times to customer care and there is no proper response.
I visited the Aircel agency from where the connection was taken, they have no proper response.

Agency Name :
COCO R.S Puram, coimbatore.

I visited to that agency last on 8/12/2015 and they said that the deposit refund cheque has returned back.I asked for the cheque details.They have not provided any details and said that the cheque expired and it will take 3 months for reissue.
Is it acceptable that cheque reissue will take 3 months ?
I have given my permanent address for cheque reissue and i have not received a single call about the cheque.They fakely tell that the cheque returned.
Also they said one line that only Rs.1000 is eligible for refund.I paid excess of 300 Rs for the last bill before porting, how come the Rs 1500 deposit amount will be reduced to Rs1000.

It is clear that they are making fake details and refusing to pay back the refund amount.

Please assist me further in this .

Thanks,
Praveen.