You really have to start being more careful, the program that you downloaded the "auto buyer" is not to be trusted. In my opinion you should NEVER ever download or trust any of these programs, no matter how trusted it is. It's a shame that this has happened to you and I'm afraid to tell you that there is nothing you can really do. You could contact EA but they wont really do much sadly. In future be more careful please, never use an auto-buyer and only ever login to Ultimate Team on EA's OFFICIAL site.