I have created some fonts and posted demo versions of these ones on Fontspace and Dafont. But with time new font websites have see the day and owners of these websites don't hesitate to download the demo I posted on Fontspace and Dafont to upload it on their own website without asking me. I first thought it was nice because this would give some visibility but this is horrible to manage, I don't have any account there so I cant update the files. I created an account on one of these websites to see if I can manage my fonts, well... I get a brand new account with zero fonts, and no way to declare these are mine. I tryed to contact the websites owners to ask them to delete my fonts from their website but it seems they just ignoring me. So now I have outdated demo fonts & license files running everywhere on these new font websites and my clients are sometimes confused when they contact me in their emails.
What can I do to delete my outdated demo files from these new font websites? What can I do to no happen again with my next fonts? I was thinking to write a message in the demo folder that say "Do not upload this demo font on other websites without the consent of its owner"