Infrastructure Development Finance Company [IDFC] — Redemption of Long term infrastructure bond maturity

Address:

KRM Tower, 7th Floor, No. 1, Harrington Road, Chetpet, Chennai 600 031

I already submitted documents to fintech hydrabad office through courier and by doing follow up mails frequently still i wil not get maturity amount in my saving account.
Folio No. IDB0256496. Long Term infrastructure Bond trenche 2
SUBMITTED DOCUMENTS:
Saving account details in form of dully signed cheque
original DD ( Which i not credited my account due to expiry date)
address proof (utility bill)
request latter signed by me.
since three month i get mail like your payment has been processed but still it will not credited my account.