HDFC Bank — double amount charged at toll in cash as well as from fastag

Dear sir,
On 1 dec 2019, at brijghat toll plaza toll was collected in cash as well through fastag. When i reached at toll plaza i told the person that i have fastag but he said that fastag not working. Thus he took money in cash. But as i left the toll i received message on mobile of deduction from fastag account. I have registered complain with 1033 helpline number on 9 dec 2019 but nothing has done till date. The hdfc customer care number[protected] never works.
What should i do?
Whenever i ask at 1033 for status they say, we do not know anything, but we have raised the querry.