National Highways Authority Of India [NHAI] — balance

When i was traveling with family from garhshankar to jammu & kashmir
The toll barrier staff didn't give us balance when we gave them 300. The receipt was 230. They didn't gave us balance. Their behave was so rudely. Same as for when we came back to our town. Toll post was lakhanpur. So plz with due respect take proper action to the toll staff.. Thanks!