Mega Cabs — Apparent overcharging and incomplete bill

I took a mega cab from t-3 at 12.15 pm on 25-7-16. cab no 9047. driver a5a4 as written by him. i came to gurgaon dlf phase-4 (near galleria) via signature towers exit. driver charged me rs.730/-. i asked for the bill. he gave it to me but inspite of asking, didn't put kms. i am a frequent traveller and i know the distance is 21 kms.
I thought i should let the company know about it. such experience doesn't help in building goodwill.
Regards,

B. k. chaturvedi
4503, dlf phase-4
Gurgaon

Former md, eicher ltd
Former president, hindustan motors