HDFC Bank — Imposing additional charges on foreclose loan

Address:

Bangalore, Karnataka, 560016

Hi my loan account number is 24830041.I took 600000 personal loan from HDFC bank, I already paid 35 installmentsNow I try to foreclose my remaining loan amount 300000 .But they are asking additional 3.45 % additional foreclose charges on my remaining amount. I come to know that as per RBI guidelines there is no any foreclosure changes.please find below url for RBI guidlines:

https://www.rbi.org.in/scripts/NotificationUser.aspx?Id=8868&Mode=0

Please find bank details below

548/D, Maruthi Mansion, CMH road,
Indiranagar, Bangalore -560038.
IFSCCode:HDFC0000184.

Please help me to exclude additional changes .