Rns Motors — In-appropriate behavior from Lokesh

I got a call from Shruthi from customer care, who cordially asked me for a service which was due since a year, my last service was done with a mileage of 78000 KM as per RNS, my current mileage is - 86000 KM.
Post picking up for service from Madhu, vehicle was attended by Mr. Lokesh- who was not cordial in talking, quite rude behavior, starting of the call he is setting up the tone that vehicle service cost will be Rs. 7500 /- why because it has a slab that it has run for 10, 000 KM, so i have two question,
Question 1 . has the vehicle ran 10, 000 KM - in this case its only 8000 KM, then why do a service and charge of Rs. 75000 /-
Question 2. I asked Lokesh, is it required to change OIL even though it has not been used in quite one year. Lokesh answered, as vehicle has ran upto 10, 000KM no matter what oil has to be changed, told me that, to change oil it will take RS. 2500/- ( obnoxious ) why will oil change cost Rs. 2, 500 /- l. I asked Lokesh did he check if oil is in good condition, he told irrespective, we have to change. i Have recently given service at Maruthi service station which was opened last year at Najappa circle Vidyaranyapura, and had changed oil. So, Lokesh without checking if oil is in good condition or not he straight away went for replacing oil for Rs. 2, 500 /- highly unprofessional behaviour. These kind of behavior will hurt affect the brand of RNS. And iam sorry to say, i am totally dejected with. I want my car back without any damage. With this experience, iam not sure if i would get back to RNS ever.