Lenovo — Worst product anf worst service

Address:

Chennai, Tamil Nadu

I have brought lenovo a7000 it has mic problem so I gave my mobile to lenovo authorised service center at chennaion 17/07/2015 its has warranty also but till now they did not repaired my phone and does not giving proper response I also communicated lenovo customer care helpline they also not given proper staus of my mobile I have attached recipt given to me at lenovo service center