Sony — unable to repair/replace cell phone

Address:

Kamrup Metropolitan, Assam

I brought xperia sp on 27 sep, 2013 after 5 months it went bad. so I gave my cell for repairs to tech shop, rajgarh road on 07 jan, 2014(job id:w[protected]and went to take back my cell on 28 jan, 2014 but my cell was still not repaired so I gave the cell for repair again on 29jan, 2014(job id:w[protected] still they were unable to repair my cell phone again i gave the cell for repairs on 06 feb, 2014(job id:w[protected] but again they didnt repair my cell phone. so I call sony india and asked for their help on which they instructed me to hand ovr my cell phone to the service center again so that my cell phone can be transfer the higher authorities. so I again submittted my cell on 12 feb, 2014 but still they have not repaired or repalced my cell phone I have requested them countless time.they has harrassed me..please help me