National Highways Authority Of India [NHAI] — Toll plaza at Mulund (EEH) is not giving discount on Toll Amount on return journey

Address:

Flat no 101 A wing Akash Height ,Old Agra Road,Cherpoli

Hi,
Today on 31 March 2021, I Travelled through Toll plaza Mulund (EEH).I crossed it from Thane direction at 1.20 p.m. then I returned on the the same at 2.24 P.M. Both the time toll plaza deducted full amount, (i.e. 40 Rs. each).actually in my return journey they should deduct 20 Rs. Only.Kindly Return My 20 Rs.