Delete Adobe Products without Account

I have downloaded and used several Adobe-Products while studying abroad with a school account. Since I'm not a student at the school anymore, my account was deactivated. When I tried to delete the Adobe-Apps Creative Cloud opened only showing the message: 

{"error":"invalid_credentials"} 

 I'm also unable to log into Creative Cloud with a different account because the schools log in site opens automatically when I click "help" -> "log in with browser". Is there a way to fix this problem on my own or do I need to contact the school?