Xiaomi India — Motherboard problem

Address:

Gulbarga, Karnataka, 585101

In gulbarga mi service center i submitted my mi note 3 phone on 15th sep 2016 due to its mother board problem and they told me with 15 days we will repair your device but still they is no rply from service center and nor they are giving me the job sheet number. And service center dont have any land line number only they have a mobile number which is always switched off.