HDFC Bank — regarding noc/clearance certificate

Address: Nagpur, Maharashtra, 440010

Myself maya pravin boke, my two wheeler loan (Activa i) is completed & the last installement date is 5th july 2017. My vehicle number is mh31 ew-5262. Three months gone but till date i cant received noc/clearance certificate even after 3-4 times visited from july 2017 to oct. 2017 to your bank at fidwi tower, sadar, nagpur.
Now, i need the noc/clearance certificate urgently, please do the needful.