Xiaomi India — mi band 2 issues

Address:

East Singhbhum, Jharkhand, 831011

I have purchased mi band 2 on 20th august 2018. My band is in warrenty and it giving me battery back up issues. I have gone to mi service center for replacement. They misbehaved with me and they are not ready to replace the band. I m visiting daily to service center for replacement but they r not ready to exchange the band. I stay in jamshedpur jharkhand and i have visited mi service center bistupur. What is the possible solution for this issue please suggest?