[Resolved]  HDFC Bank — unknown phone number

I got call from below number [protected] with the name of HDFC bank. I tried to look for all the numbers with HDFC and city as pune in below site http://www.bsnl.co.in/opencms/bsnl/BSNL/directory_services/online_telephone_dire...⇄ . However with initial 15 pages search none of the number was starting with 690 excluding city code. Also when I visited the HDFC Hinjewadi branch sometimes back they provided me number [protected] along with a email id to whom I can contact (I asked for same). But no one replied to my by writing to that email id neither anyone picked call by calling to this number. Also further to mention this is example I am getting lot of calls from unknown numbers and it's just example. Atleast for above please investigate