National Highways Authority Of India [NHAI] — fastag account is debited even not travel through toll plazas

Address:

rajahmundry, 533103

I have taken fastag for the car reg ap05ed1559 from karur vysya bank on 13-nov-2019 with tag i d number 34161fa8203286f80a636ec0.
Recently i am surprising on very dangerous problem, amount is debited from my fastag account with out travel through any toll plazas. On[protected] for rs 225/- and two times on[protected] for rs 235/- and rs225/-. I am very much surprised with these three wrong debits (Total amount is debited is rs 685/-) with out travel on n h.
I am very sad to say this, we are facing so much trouble whether the problem exists in kv bank or in toll plaza. I am not able to travel through toll plazas without the recharge amount. If i recharge the amount then automatically amount from my fastag account is debited without travelling. Then how should i travel?.