Consumer Redressal

Hi, I have purchased the Motorola google nexus 6 on feb month. i had an issue with the phone ( mic problem ). now from last 2 months my phone is in service center. they arent repairing my mobile and not providing new mobile.. everyday i am visiting service center which is located in chandigarh sector 31.( vignesh services chandigarh ). everyday they refuse my problem and saying that it should be fixed in next 2 to 3 days. no one taking action against then.. please help me i lost my 45000 rupee. i really need help.. thanks