Punjab National Bank [PNB] — Pension

Address:

New Delhi, Delhi, 110052

I am a pensioner, with PNB account number [protected] at Ashok Vihar Branch Phase 2, Delhi 110052 ( IFSC Code PUNB0063700 and MICR code:[protected] since beginning.
I have noticed my pension has been reduced, whereas it should have gone up. My pension credited from Feb 2015 to Apr 15 was Rs 18, 645/- from May to Sep 15 it was Rs 19, 185/- in Oct 15 it was Rs 19, 726/-, however in Nov 16 to Dec 16 it was Rs 15, 173/-and Jan 16 to Aug 16 Rs 17, 805/-.
I am surprised as to how my pension has gone down instead of going up.

Also I have not received arrears w.e.f. 1 Jan 16 for the 7th pay commission.
ALSO WEBSITE OF PNB IS NOT ACCEPTING ANY COMPALINTS.
KINDLY LOOK INTO MY GRIEVANCES AND DO THE NEEDFUL