Consumer Redressal

Fraud Done by HTC service center DLF Grand Mall Gurgaon.Phone given to them for repair under warranty on 09042015.After 1 week when I called they agreed that issue with display and told me they have ordered a new one but after 1.5weeks they called back that my display is duplicate and they cannot repair under warranty.I argued a lot that I have not got it repaired outside and display was original but they didn't agreed.They have done a fraud by changing my original display with duplicate one which is very clear because after 2.5 weeks they are telling display is duplicate. I would like to file a case of fraud against them They must have got the original one and sold to some other in higher price or it might me there way to extract money from the customers.