National Highways Authority Of India [NHAI] — double deduction of toll amount in mumbai-pune highway toll

Travelled in 8th dec 2019 from mumbai to pune. The toll plaza personnel told me that the fastag is not working and you have to pay in cash. After payment of cash i got cash receipt gate opened and i passed by. After 10 minutes of travel from 1st toll gate got sms of fastag amount deduction. Same enquired in next toll gate in lonavala but the personel didn't return me the cash payment amount but told bank will return the same. After passed by lonavala again fastag was charged as cash receipt is not considered.in next day i was trying to contact the hdfc bank fastag complaint numbers. Those number is not reachable anytime. I found the grievance request in website of fastag section and requested the same complaint as transaction dispute.

But it is more than 20 day. No one is looking into the case yet. Also not found proper channel to contact.

As per transport ministry declaration it will be done within 15 days of complaint. But if no progress made in the complain yet. Not sure how safe using of fastag in india. Also hoping my extra money return but it is diminishing in the system current stand.

I am sure similar case happened to many in mumbai pune high way toll plaza.