regarding leave encashment and pf amount decuction.

1. Leave encashment : I work in a IT industry , my initial basic salary was Rs. 8600 . It as increased to Rs.15000 from april 2019 , also it was shown on my salary slip. I am on notice period currently(resigned on 29 August 2019) , however my HR said me that my leaves will be encashed based on old basic salary ie. Rs. 8600 and not on current basic salary of Rs. 15000. I think it should be encashed on current basic salary , Please advice . 2. PF ceiling : From November 2019 my pf contribution was Rs. 1000 also my organization contributed Rs.1000 . However due to new PF law my contribution should have been increased to Rs. 1800 based on new basic salary (Rs 15000) from April 2019 . However my organization deducted Rs.1800 from July 2019. which leads to loss of Rs. 2400 (Rs. 800 from April-June) .Now my company has denied to deduct this 2400 from my salary and is also denying to pay this amount of Rs. 2400 from the company's end . Please advice on this .