I purchased lg / refrigerator 2 door model GL 295 TMG4, 280ltrs. on June 3rd within 1 month it started giving me problems, 1st the gas got over, they repaired it, in august again same problem and they repaired it. now again it is spoilt, the technician says the pipe line is choked, this was on Saturday 23rd. Oct. till today no one has come to repair it. I want this fridge to be replaced.what should i do?