Your AVR headset is broken. You need components to fix it.
I have those
First, you need to get out of your apartment.
Did you talk to the fellow engineer in the shop?
Now, get back to your Apartment (with the bike) and there you can fix the headset using the workbench.
While at the 2nd floor, use the Screwdriver kit to the Disposable AVR goggles to get the lenses. Then use the battery on the AVR Headset.