Xolo — Service Center Careless about Customer problems

Dear Sir,
I have XOLO BLACK 1X, having excessive heating problem, on addition to this Touch is Not Properly Working, Display becomes Blank sometimes and phone automatically Switch OFF.

My Phone in warranty period so Regarding above Problem i submitted my phone to one of your Service Center (Mayank Services) on 01/10/16. Its more than 20 days but still i cant get my phone back from the center. Each time i visit i get a new date, due to this i am facing a lot of problem.
So you are requested to take proper action regarding this. An early action will be highly appreciated.

Service Center Detail:-
Mayank Services

WZ168 First Floor B Block Arya Samaj Road Uttam Nagar New Delhi- 110059
Delhi
Uttam Nagar, Delhi
Phone:[protected], -[protected]
Service Center Types: XOLO Service Center

Service Center Type: Authorised Service Center

Phone Detail:-
Xolo Black 1X
IMEI No:- [protected]

thanks,
Zawed Hussain
Mob No:- [protected]
mmziyaul.[protected]@gmail.com