National Highways Authority Of India [NHAI] — Extra toll tax charged on panipat toll tax

Hi yesterday i had crossed panipat toll tax to drop my family member after dropping them toll tax was not deducted then toll plaza person asked for rs.70/- i asked him to charged it from fast tag he bluntly refused and said you have to pay this amount otherwise you cannot move.

Now all motor vehicles are using fast tag which is compulsory then how can they asked for money if we have fast tag is there any law or provision regarding this.

Need your interference to resolve this matter