Acer India — Faulty laptop sold by dealer,very poor after service,lost 35 k altogether

Bought acer laptop from Logitec systems, Pattom, Trivandrum, Kerala.From the begining, laptop showed problems like not booting when powered on, showing grains when powered on, frequent auto shut down while working etc.Complainted in acer two times, and every time they got it somehow repaired but only remained working for a few days and it auto shut down and got dead while working.Last time their technicians argue that they suspect unauthorised servicing of laptop and hence it can't be repaired eventhough we have paid warranty extension.It is a very pathetic situation, feels like robbed, paid 35k but product not worthy for even 35 minutes.