Xiaomi India — complain about mi service centre

Address:	793002
Website:	Xiaomi.com

I went to the mi service centre to get my mobile repaired as it was not working properly. It was discharged in a short time. As i went to the service centre (San cellular concept) barik shillong meghalaya the said me to pay ₹2500 to get the battery replace. As the mobile was new it was under warranty not even 3 months was completed. So i want my battery exchanged.
Thanking you...