@JonathanCo 

Hi, 
1. Power off/on the camera will reboot it but won't reset it.

2. In your usage scenario, you can try the following steps.
    1) Change your Wi-Fi password and Wi-Fi name back to the original one.
    2) Reboot the camera and check if it will reconnect to the Wi-Fi network. If not, it's required to hold the reset button for 10 seconds on the camera to factory reset it.
    3) If yes, go to the Tapo app and wait for the camera to display the online status. Remove the camera from the Tapo app to reset it.
    4) If the camera has a flashing green and red light, change your router's Wi-Fi settings and reconfigure the camera.

Best Regards