Quick fix, remove networking access for all devices, not just LG devices.

But since you did that remotely, you probably do that from a "smart" phone. That one is worst than this LG device.

Have you read terms of service of Android devices? Windows? Apple?

Microsoft like Gamers Nexus show on the video, writes down that this practices are malware and illegal and does exact the same thing.

Gamers Nexus amazing review of that LG https://youtu.be/Q9uefFYe6bM

My favourite part of LG T&Cs from that video:

i. CONSENT REQUIREMENT: You acknowledge and agree that it is your sole responsibility to obtain all necessary consents from any third parties whose voices may be captured by the Product and to notify household members and guests that their voices may be captured and processed, in compliance with applicable wiretapping, eavesdropping, and privacy laws. If anyone does not consent, you should disable the microphone or voice features in the settings. LGE disclaims any liability for your failure to obtain such consent or provide such notification.

> Have you read terms of service of Android devices?

Don't remember agreeing to any ToS before (or after) factory reset, put SIM card in a phone, and start using it. Granted, it's been a while since I last bought one.

And no, "by using you agree to ToS" is much like a shrink-wrap EULA for boxed software: doesn't fly in many jurisdictions. Explicit consent to do anything that violates users' expectations, is important here.