LG Electronics — Lg split ac installation

Address:

500032

Lg support service seems compromised now. Their technician are not professional and need to be careful as they can spoil the product. My split ac installation messed by them and now following up for 1 month and no one respond. Customer care every time take complaint and promise for response.
My original complaint raised against rna[protected]
Now outside technician tell it requires fix of 5000 and lg technician never arrive. What are options?