LG Electronics — Lg refrigerator 255 ltr

I have a lg refrigerator 255 ltr, bought on 8th march 2016 in tiruvalla, kerala. I had registered my online complaint on 19th may 2016 when it stopped working one fine morning. Before that we had complaint locally to your lg service center. There had been no response from your service center. Later they came and repaired my refrigerator for a cost of rs. 2726/- saying if we do not pay, they will not repair it. The capacitor has got burnt. I fail to understand why have you taken the money from us when its in the guarantee period and in the warranty period. On the 18th of may, there was no lightning and no thunder and no rains. The person says that it was due to the high voltage fluctuation, which has to be handled by your inbuilt stabilizer. If it has not handled, then there is something wrong with your refrigerator. When your person had come to install the refrigerator the very first time we gave them the external stabilizer to attach with it, they said what is the use of the inbuilt stabilizer then. So who is responsible for the problem that has been created. Lg is responsible for the problem and you are supposed to pay the amount back to us. I have complaint on the lg website but there is no response at all.
Kindly look into this matter and return our money back.