Haier india - It s been 3 months Haier service has taken the money but not been able to fix my AC issue

I have Haier AC which was bought in **** and currently is out of warranty. In May **** the AC stopped working, so I approached Haier customer care to fix the issue. On June * ****, technician from Haier authorised local service center sent a technician, who changed PCB and filled gas in the AC. The AC was still not cooling, technician fooled us by saying that there is some problem in the adapter so I need to change that, after that AC will work. He said that AC is fixed so I needed to pay the amount of ***** INR. I paid. The next day we changed the adapter but the AC did not work. Since that day I have been following up with the Haier authorised local service center(VIKKI SERVICES), Haier India on Twitter, and also with some Haier executives(Mr. Nagendra, Patna branch) but everyone has failed. No one has been able to fix the issue and it's been stressful for me to keep following up with them. I need a deadline within which my AC should be fixed.