downgrading of performance over time

[bowryjabari]

I have a Asus Vivobook K5504VA. It came with a 120hz screen that worked fine when I was under warranty. I noticed recently that I can only get 60hz and the option for 120hz is not there anymore. I called Asus and had multiple support calls/emails with them and they keep selling me I need to pay to send it in. It is clearly a driver software issue and they just refuse to fix it. I reset windows completely and I can't see the optioan for 120hz. When I load old drivers the screen goes to 120hz for 2 seconds while the installation process is happening and then quick goes back to 60hz again with no option for 120hz showing in the settings. Anyone else notice this error with this model? Any fixes?

[Falcon_ASUS]

@bowryjabari 
If you have restored the system but the issue persists, it may be caused by a problem with the graphics card. We recommend that you take your laptop to a service center for further diagnosis.
The following is the contact information:
https://www.asus.com/support/service-center-location 

Also you can contact the local service center for help.
The following is the contact information:
https://www.asus.com/support/CallUs# 

Sorry for any inconvenience it may be caused.

[bowryjabari]

This doesn't make any sense. Can I get a credit for this to be fixed? I think it is unfair that I am now expected to pay to fix something that is clearly a software issue on your end and there is no credit for me at all. At some point I obviously got a Windows update and now my screen is operating at a lower than advertised resolution and refresh rate. This seem very dishonest from a company who says they make quality products. This laptop has been kept is pristine condition and is less than 2 years old. This shouldn't be happening and I shouldn't have to pay for it.