I changed my email and lost ownership of the board in both emails

@fachrinfl - Did you change your email address using the steps in the How to change your email help center article? Or did you create a new Miro account profile and were added as a new member to the team? If the latter, it is expected that you would not be the owner of any existing boards. 

Which Miro plan/subscription are you on?

It is also worth noting that in the above help center article I liked to, if you are on a plan that is using SSO, i.e., Business or Enterprise Plan, the Miro support team may need to get involved. 

Since you are using a paid subscription, you can open a Miro support ticket by following the steps in this help center article (scroll down to "How to contact Miro support from board/dashboard"):

https://help.miro.com/hc/en-us/articles/360020185799-How-to-contact-Miro-Support