HDFC Bank — Double toll charges ,Fastag and cash

Address: mumbai

I am a HDFCBANK customer and have also got fasttag from hdfcbank.
On 06 Nov 2020, I was coming from Khopoli to mumbai via khalapur.At toll point in was in the cash lane since I knew that I did not have sufficient balance in fasttag.Hence I paid cash of Rs 203.Later today i found that i was debited Rs 203 from my fasttag account also.
I need to complain about the toll personnel who should have tolded me that the amount was debited from my account and I need not pay cash.
I need refund for the same and an explanation for the mistake.

Car regn no: MH43 AR 3271