Haier India Deep Freezer — scammed by technicians

I requested for a technician as my freezer got punctured. Someone called me telling me he was sending their technician. Two guys came and "fixed" it. I asked them which company/website they were from and they said they were from Haier company and that they were an outsource. They took rs 4000 from me but the fridge is not cold enough.He also said he willl send the bill and it has been a month but there is no bill from him. I do have a screenshot of the payment. I called them to check it again and after a week of calling, the technician finally came to check. He said he fixed it but it was still the same. I've been calling me but his number is switched off now. I called the guy who sent him but he has blocked me.