https://www.tp-link.com/ru/support/faq/2586/ После всех ваших попыток предлагается обращаться в суппорт Q2: Device failed to bind cloud account: the prompt "This account is already bond to this device" appears when binding TP-Link ID. Please try to factory reset the router by pressing and holding reset button for 10s until all lights flash once. When factory reset, make sure the router is connected to the internet. If the same problem still exists after factory reset, please collect the S/N, LAN MAC and MAC address on the device label, and then contact TP-Link Technical support. Note: LAN MAC is available on the status page of web interface.