HDFC Bank — my demat account got closed in 2016 but again depository charges from 2017

Address:

Faridabad, Haryana, 12108

Dpid : in301549 client id : 37324095 was closed on hdfc bank securitites deptt branch nit faridabad on 2015.
My account nos [protected] was not deducted any depository charges henceforth.
But to my surprise, on 15th feb 2017 and this year too 20th feb depository charges started again to deduct from hdfc account.
I am running pillar to pillar to close this but not to my help.. I am wondering when this demat account already got closed and on 2016 it was not deducted why depository charges again started to getting deducted from 2017.. And this year too
This is pathetic... I don't know what to do.. I have already mailed to [protected]@hdfcbank. Pl help