Lenovo — phone not repaired by service centre in 3 months

I submitted my lenovo zuk z1 at 11 May 2017 at lenovo collection point anpara state UP and then they call me that my phone had repaired but when I reached there phone was not repaired then I have to submit it again at same day 18 June 2017 now after that due to negligence and irresponsible behavior of collection point (Anpara)and service centre (varanasi) I waste my time and money both on under warranty phone.they also make me to visit there service center as well as collection point to collect phone but that is not found repaired every time.