National Highways Authority Of India [NHAI] — Complain about extra charges deducted from fastag than usual

I am Kevin Bajpai from Nashik Maharashtra.
I am traveling from Nashik to Sendhwa through Mumbai Agra Highway. Along my route at Baswant toll gate I was detected 210rs, at Chandwad toll gate i was charged 145rs at Songir and Shirpur I was charged 75 and 120 rs respectively through fast-tag.

Fast tag was introduced to increase the transportation Speed and to lower the toll charges . I travelled 230 km and was detected 550 rs . The toll rate has been increased than the usual rate . There is no option to check the toll charges and to check for how much Kilometer we are been charged . Kindly make your system coustomer centric

Kindly look forward to our issues, waiting for your reply asap