National Highways Authority Of India [NHAI] — excessive toll charged for single trip

Travelling from Mumbai towards Kolhapur via Pune Express Way on 1st Jan 2021 . I was charged excessive toll .
Toll Booth ( Khalapur) thru ETC - Rs. 203
Toll Booth ( Talegaon ) Thru Cash - Rs. 203 ( as Wallet was showing low balance had to pay cash ). Total one way journey costed me Rs. 406 / -

While returning back on 4th Jan Night, i preferred as go for paying thru cash which was just Rs. 270/-.

Difference AMOUNT 406 - 270 = Rs. 136 charged as extra amount .