National Highways Authority Of India [NHAI] — kotak bank fastag not refunding double payment and no toll free numbers or proper response

Address: #36,BB Nilayam, 9th A main, 3rd cross, Chairman Layout, Banaswadi

Website: fastag.support@kotak

I have Kotak Bank Fastag which at devanahalli toll plaza deducted the amount but still made to pay in cash on December 14th. I have written multiple mails to Kotak Bank Fastag complaints email without any response and even they don't have toll free numbers. How do I get my refund. Please cancel Kotak Bank fastag authorization. My mobile #[protected]
Mail ID [protected]@yahoo.co.in