Hisense not taking responsibility

Its been 4 days and i am still no closer to getting help from Hisense. Our fridge / freezer is not working due to a Freon pipe leaking. After talking to numerous individuals, I was told by there service centre that the unit is just out of warranty (2 months) and they will not assist with the repairs.(unit is 4 years old) I feel this problem is an assembly fault and bound to have failed from day one. Hisense needs to take this seriously. The pipe has be damaged due to rubbing with the drip tray. And now the freon pipe is corroded, leaking Flammable R600a freon gas. Surely Hisense needs to take responsibility for this fault. Regards Riaan