TTK Prestige — complaint against service center.

Address:

Mahagun villa, 201010

I have purchased prestige hobtop model "phts 04 ai" for around rs14000/ in aug 2016. It was the most expensive gas stove available in the market but i still purchased it in the hope of good quality and service. But i was totally wrong the gas stove is a poor quality as it's autoignition stopped working within 3yrs (It's actually not working since last 1yr). The gas stove was used precisely as per instruction manual. I knew that the stove is outside warranty so i requested for a paid service (Service complaint number ghaz1105789). A service personnel (Named danish siddiqui) visited my house today he replaced 3/4 rubber washers after which he asked me for payment rs850 towards repair. When i asked him that i was told rs295 only for service, he said the 4 washers are replaced which are worth rs550. He offered to charge less if i agree to get repair done "privately" without entering prestige company books. When i disagreed for "private" repair from a person who was claiming to be from authorised service centre, the person got aggrieved and started misbehaving. It got me suspicious and i asked for identity card. The person claimed prestige don't issue any identify cards to service personnel. I asked for a proper bill from prestige company, he again said prestige doesn't issue any receipt for service jobs. He can only issue a "private" receipt without any prestige authorised service centre name on it. I suddenly realised this person doesn't carry any document which can prove that he is from prestige authorised service centre.in fact the parts which he replaced didn't carry prestige name either. I refused any service from this person. He got further aggrieved and threatened that theirs is the only service centre in whole ghaziabad and if we don't get repairs done by them them nobody else will come again as prestige don't have any company operated service centre and are indeed dependent on francise like them for service repair. They removed the parts replaced by them and in the process damaged my gas stove even further. Later i got a call from mr gulfam khan from "siddiqui service centre" who misbehaved with me again.in the evening i got a call from another person (Ph[protected] who claimed from prestige regional service centre and repeated again that prestige service engineers don't carry any identity cards, neither do they have receipts issued from the company.
This high headedness from both franchise and the company left be wondering if i had made the right decision to buy such expensive gas stove from prestige.
Why prestige makes such poor quality gas stoves which don't even last 2/3 years (It is apparently their premium range product at a premium price). How can a company of the class of prestige not issue identity cards to their service personnel. Why doesn't prestige issue any job receipts for repair jobs done by their franchise. What will be the validity of such service warranty. If no receipts are issued by company then, how can a customer be sure that the parts used by franchise are not fake or sub-standard. And lastly how such hooligans/ goons are given contract for service franchise, does prestige do any background check on them. My 3 yr old prestige hobtop is now a piece of junk lying in the kitchen with no proper repairs.