See Factory Reset guidelines.
If the Wireless Smart Plug will not pair with your Smart Home Hub, you need to reset the plug and then try the pairing and configuration procedure again. Here are the directions for factory reset.
1）Keep the Wireless Smart Plug plugged in the wall outlet.
2）Hold the power button and count for 8-15 seconds then release it.
3）You should see the blue indicator LED blink 5 times and hear a clicking noise. After that, the blue indicator LED will flash slowly, which indicates a factory reset is done successfully.
Tip: If the Wireless Smart Plug doesn’t respond to reset, please manually click the power button to turn it on, and then perform a reset.