Lenovo — Lenovo mobile vibe Shot (Z90a40)

Address:

Ahmedabad, Gujarat, 380015

I have purchase Vibe Shot 4month back, after some time problem started for call dropping and problem of network, so i had contact with Lenovo mobile service center, i have raised complain on 10th of Sept 2016, they have inform me that, there is a problem in PCB so u have to put the phone in service center for 15 days, now its more then 20 days, nothing happen, i have called many times for this issue, but no one is giving proper answer for this, now i am feeling that i did a big mistake that i buy Lenovo mobile,