National Highways Authority Of India [NHAI] — Toll deducted 2 times

We are surprised that Kaikhat toll plaza, Bihar has deducted toll two times within 25 minutes while coming from Darbhanga to Siliguri.
How can this be possible?
These people has been cheating customers. We are unable to understand as the message comes after half an hour.
The fasttag attachment is attached herewith.

K K Choudhary
The Statesman Ltd
Vehicle WB02AL8043