Luminous Power Technologies — Defective inverter

I bought solar nxg 1150 inverter and power charge battery PC20042TT around 25 days ago purchasing date 19 th may 2023 but with in this short duration my inverter start hang & heat, when I contact dealer they told me to complaint online than I contact customer care and they send some one who was not able to detect the issue in initial attempt and left without fixing it .but when I face problem again I called them and they came and told me that. Fan is not working in inverter it would be replaced next 2 days but they didn't show up till 3 days then I called them again they came and fix my inverter same as it without replace any part of it, to be honestly I was not expecting this kind of behaviour from luminous . I am requesting luminous to solve this issue still I am facing the same issue with my inverter.