HDFC Bank Limited — fixed deposit

Address:

Mumbai City, Maharashtra, 400098

My father and mother had fixed deposits (Ch/1687465, ch/1687520, ch/1687472, ch/1687537) with hdfc. All these deposits matured in jan 2019. I am the nominee for these deposits and since my father and mother have both passed away, i submitted an application for claiming the deposit money and credit to my hdfc bank account. My hdfc bank manager verified my account number and signed on the hdfc limited kyc form. I also provided a cancelled cheque as directed by the hdfc bkc branch. After completion of all the documents with the original death certificates and original fd receipts were submitted to the kalina office on 29th jan 2019. They checked it and assured me that the money will be transferred to my bank account in one week.
However i received several calls from various hdfc offices asking for documents which were already provided and the last one from hdfc chembur office saying that the hdfc bank manager needs to sign the application that i have written in addition to the kyc
This is sheer harassment of a simple straightforward claim that should have been paid by now. It's extremely sad that a reputed company like hdfc can do this to its customer!
Please help resolving this issue