LG service engineers cheating consumers

I purchased a LG 6.2kg top load fully automatic washing machine in month of sept 2017, which has a 2 year warranty.
Yesterday i faced an error while using the machine, PE error, i contacted LG customer care(today dated: 8-Aug-2018) and a service engineer visited (same day). He said before coming to my house that this issue might be because of rats chewing the wires if this is true there would be a service charge of 599 rupees, i agreed to this. But when he came and opened the back cover of the machine we saw a dead rat lying there. And there was no damage to the machine wires or the machinery.
He cut the wires to bring out the dead rat, for this i have to pay the amount 599 rupees
My concern is when there was no damage caused by rat, the wires were cut by the service engineer.
Why should i pay for the damages caused by the LG service engineer?

I called up the LG support center post this incident but they didnt paid any heed to my concern.

LG customer care is cheating consumers by claiming money due to their negligence or their fault.