Acer India — 1 month is passing giving my laptop service center not solving the problem of my laptop

Address:

Nagpur, Maharashtra

Sir / madam,
I had acer predator helios 300 it started flickering every 10 second after that i go to service center and i submit my laptop after that not getting any response when i call the service center it always says that it is on process or says that the part hasn't come to service center and i also see the case id it always show allocated and i also contact to acer customer care it always says that the part is delivered to service center.
Plz try to solve this problem asap