Consumer Redressal

Purchased a new Microsoft 535 mobile phone for my son Srinjan Ghosh from S.H.MUMTAZUDDIN showrommat Lenin Sarani just 4 days back.From the very begining the sound of the phone was not working.On the very next day went to the showroom with all relevant documents,instead of replacing the phone they advised me to go the Microsoft service center,as they confirmed it was only a system problem and that can only be done by Microsoft.Hoever,the service center accordingly rectified the problem.Again from today the same problem recurrs.When contacted the Showroom they are now simply avoiding their responsibilities,instead pressuring me to repair the new set from service center.Their behaviour is also not saticefactory.