We bought fast tag from Paytm. From Bangalore to Chennai at Krishnagiri toll fast tag was not working an we paid cash. After 15 mins my account was automatically debited 65 rupees. When we tried calling Paytm customer care they said it's not our problem and due to technical error it happen. Vthey are not ready to refund. This is 3rd time happened. Such a worst service an cheating the customer. Don't buy fast tag from Paytm