WeChat and its website do not allow for easy account removal.To remove a WeChat account, follow the instructions below.
These instructions suggest you have access to your account. To recover a lost password, use this link: http://support.wechat.com/getpassword?lang=en
Open up WeChat on your device and go to Settings. Click ‘Clear Chat History‘ at the bottom of the list and confirm by clicking ‘Clear Chat History’.
Next, still in Settings, find and click ‘My Account’ and revoke, unlink and disconnect all third-party service(s) but keep your verified email address for verification purposes.
Now go to your profile and write down your WeChat ID, which is needed for the deletion request.
Next, contact them per email:
Send a removal request via email: firstname.lastname@example.org
Politely ask for account removal. Include your account details and your WeChat ID.
Lastly, Remove the app. That’s it!