Luminous Inverter — Not working and services are not provided

sir,
I launched the complaint on 28th may 2009 . My inverter was not working. My complaint no was 285991. The person from Luminous approached us and told us that plates in inverter has damaged and he had to bring the new plates.The next day was sunday . so He didnot come. On Monday after waiting till 3.00 PM again I called up and requested them to do needful. Then they came and changed the plates. The Inverter on the next day again stopped working . Again I launched the complaint And my complaint no is 283443. This time again he came next day after launching the complaint. He checked the inverter and told us that something is wrong with inverter. So he has to take it to the company and check it properly. So he will come again next day for that. Then again he did not come till 3.00 PM again I called up luminous office atleast 5-6 times and requested them to come and change and give the stand by. But after not availing my request I told them that I will go to consumer court they at last came at 4.30 PM and changed the inverter with stand by. Now again on the same night the stand by inverter stopped working. I again called up in the morning and requested them to check but after so many requestes one person came and told us that he cannot do anything as Inverter is fine and something is wrong with battery. We have checked the battery and that is working fine . But he is not ready to listen and neither their office staff. Tell me what to do . I can not live without inverter one more day as it is very hot. and because of which we have bought the inverter. I request you to do needful