Hacker Disconnection and Network Security Overhaul

I'm going through a distressing situation where a hacker, someone I know has misused his work credentials to gain access to my network and devices. I became aware of this connectivity to a public network based on the suspicious activity on my device and unusual network behavior. It seems that the person has gained administrative access to a lot of my devices including my smartphone, router, TV, doorbell, and even extending to neighbors' networks.

What has compounded the situation is that I'm unable to make any changes due to the hacker's administrative control. It's reached an alarming stage and I need expert assistance urgently.

The tasks that will need to be addressed are:

- Disconnecting from the hacker-controlled public network
- Securing my devices and networks
- Restoring administrative control to me
- Identifying potential weaknesses to prevent a recurrence

Ideal freelancer for this task should:

- Have experience in network security, particularly in dealing with hacking incidents
- Be knowledgeable about security measures for various devices including smartphones, routers, smart TVs, and doorbells
- Have excellent problem-solving skills and the ability to work quickly under pressure

NOTE: Due to the sensitivity of this situation, discretion is highly important.