National Highways Authority Of India [NHAI] — Penalty charge in Fastag lane

Penalty of 125 charged on chhajarsi fee plaza from going to delhi mentioning that fastag is black listed. There was a long que so I paid the same and then checked with the bank that the fast tag is active.
There might be some problem in the reading machine. Request you to return my penalty. Thanks and Regards
Amit
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Raushan.[protected]@gmail.com