Bharat Sanchar Nigam [BSNL] — Broadband portal issue

Address:	Mysore, Karnataka, 570017
Website:	selfcare.sdc.bsnl.co.in

Broadband Area : Mysore (Vijyanagar) Karnataka
Government had given for landline and broadband user to manage or know her/his information himself. There have an option to change broadband password

But never working, resulting as unauthorized use of my broadband id with help of telecom (BSNL) staff, many time I raised ticket about it, but no action. Please advise me what need to do next.