Please follow the steps:
1. Open your Facebook account settings: http://take.ms/IurMM
2. Find the General section and edit your email: http://take.ms/jIXVc
3. Add another email and confirm it: http://take.ms/rNQ2d
4. Make the second email your primary one and then delete the first email.
5. Save the changes.
6. Perform these steps once again with the email you want to use.
Contact our Support Team if you have additional questions.