Xiaomi — service center issue

Address:

Vadodara, Gujarat, 390016

I am end user of your service since 5 years and i never ever faced any service related mi phone and services as well now i have bought redmi 4 on 16 oct 2017 but first time i am experiencing that phone getting heat and battery drained quickly, so i have visited your hcl service centre vadodara but they just format my phone and downgrade version and asked me that it is ok but still problem persist so where i can go and what rabbis service giving by vadodara service center people.
Please check and do the needful on priority.
Jobsheet number is:
Wxin[protected]
Thanks and regards
Abhishek singh
[protected]