Johnson Lifts — Complaint about battery replacement

I have got manual lift fitted in my house last year in July month in Bhubaneswar, Odisha. During warranty period the lift battery got damaged and I reported it the month of March. The maintenance guys assured it would be replaced but due to covid situation it wasn't done on time. We are still waiting for it to get replaced. After multiple complaints things are not getting fixed. Please address the issue urgently