Honda Cars India Ltd. — complaint against over billing in car service

I am the registered owner of honda city car bearing registration no. Rj 14 wc 5643. The car was sent for servicing at pink city motors pvt ltd. Jaipur on 13.01.2019 (Morning) through driver tara chand. At about 10.43 am, i received a call from mr. Yadav through mob. [protected] that the total charges for services would be in between inr[protected]/-. I requested to drop the vehicle latest by 1500 hrs, to which he assured me.
Again around 1300 hrs i received a call from the same number and mr. Yadav told me that since the vehicle has a run of 20000 kms, its break-pad was to be replaced for a payment of inr[protected], to which i denied.
I made a call to mr. Yadav at 15.08 hrs and asked about the status of my vehicle, to which he informed that the vehicle would be delivered by1330 hrs and that i have to make a payment of inr 10000/-. A message was also received over my mobile no. [protected] at 15.26 from vm-tnorth to the effect that "invoice inr 10000 for your vehicle rj14wc5643 has been generated".
Since the amount generated was not in the line i was told earlier, i contacted mr. Yadav over his mobile at 15.33 hrs. Mr. Yadav told me that the charges of inr[protected]/- as informed me was his mistake and i have to make a payment of inr 10000 to the ambassador rajendra thakur.

The car was dropped at my residence at about 1600 hrs and i made a payment of rs. 8632.00 to rajendra thakur.in a couple of minutes, i again received a call asking me to pay inr 10000/- towards service charges as has been messaged to me earlier.

I request you to please look into the following issues :

I) the car was not at all cleaned either from inside or out side.
Ii) why they charged inr 8632 against the agreed payment of inr[protected]/- without proving any extra services.
Iii) when the invoice was of inr 8632/-, why the service provider was insisting me to pay inr 10000/- (Through sms as well mobile call).
Iv) when the vehicle was to be delivered by 1500 hrs, why the failed to deliver the same at the given time.

Thanking you
Sanjay sharma
Dy supdt of police,
Cbi