[Resolved]  HDFC Bank — wrong amount deducted from my fastag wallet

This is with reference to my visit to pune on september 2018
On approaching the khalapur toll the executive enquired with me regarding fast tag. I had clearly told the executive that i have not yet started usage of fast tag an asked him to rather take my card for payment.
He said ok and used my card which was debited with the toll amount of rs.230.
Later i observed i received an sms from hdfc stating fasttag amount of rs.138 was also debited to my fast tag.
I have been debited twice for single transaction.
When i enquired with toll official he clearly said me to approach my bank fast tag for reversal of fasttag amount as nothing can be done from their end.
I have already emailed the toll receipt and the card swipe statement to email id fastag. [protected]@insolutionsglobal.com.
Its almost 1 month and there is no reply from hdfc bank and my money has not yet refunded and my fast tag has blacklisted due to insufficient balance.
I have already sent reminder email to same email id mentioned above and also called the customer care for same issue but customer care executive every time say me to send reminder email.
Please let me know how many times i have to send reminder email?
If can't give support then please take the fast tag back and refund my money which i paid during the purchase of fast tag