Long shot, but I wonder if Notebook Fan Control could slow down the fans. You could try selecting the GL702VM profile within the app. Worth a shot, maybe.
Not the same system.
GL702ZC has desktop Ryzen 1700 and RX 580 in it... it's all AMD...
The GL702VM is Intel+Nvidia.
Not sure it's a smart idea to try it.
EDIT: Tried it for the kicks, but the program stopped displaying anything when I was inside it and just decided to continuously stop and run it's service.
Not gonna try that again.
Sorry you had no luck, it was the longest of shots. I hope you find a fix soon or someone with more knowledge chimes in.
A similar problem, the laptop version for German use, seems like a mass broken ...
Have you been repaired?