Hello Nic Kuvshinoff,
This sounds like there may be an issue with the earpiece of the device, but from your description i cant tell if its software or hardware at this point.
Please complete a device reset on the device, and if the issue persists through a reset then i would recommend looking at your options for replacement.
To initiate a replacement:
Note: Your device must be registered under your Microsoft account to submit a repair request.
- Go to Device Services and sign in with your Microsoft account.
- Select the device you want to submit a service request on.
- Click 'Info & Support
- Select Start a Service Order and follow the instructions to complete the submission process.
Thanks,