Unauthorized Email Change on My Konami Account

Today in the morning I realized that the email address on my Konami / eFootball account had been changed without my permission. When I check the login screen I see a different email address instead of mine, although I can still log in to my account. I still have full access to my original email that was linked to this account, and I did not authorize anyone to change my account information. This situation makes me worry about the security of my account and any possible misuse. I request that the email change on my account be reverted, that my original email address be restored, and that my account be fully secured. I also ask you to investigate how this unauthorized change was made and to ensure that no one else can access my account without my consent.