Hello Khang Ngo，
Welcome to the Microsoft Community, please know that your current question about Microsoft Rewards (formerly known as Bing Rewards) is beyond the scope of the Community's support, as it requires Personally Identifiable Information (PII) to be properly supported, and as this Microsoft Community is a public forum, please do not provide or use PII here, in order to protect your privacy and security. Thank you for your understanding.
The official Microsoft Rewards FAQ can be found here. If the FAQ does not resolve your issue, you can create a support ticket with the Microsoft Rewards team by visiting https://rewards.bing.com/support . When submitting a ticket, please make sure you are logged in with the account you need support for（(unless your account is no longer available, consider switching to a different account) ）and provide as much information as possible to submit the issue, then please be patient after submitting as this is a very small team so there are a lot of users in the queue.
Hope the above methods can help you
With best regards
Ciliro | Microsoft Community Support Specialist
