Need help in my unique case

Hello everyone, I got admitted in tu dortmund in summer 2025 and i complete my enrollment process right after that but later realized i wont be able to make it because of the delay in the visa process so i exmatriculate myself and now i paid the semester contribution for winter 2025 but the issue is i am unable to login my campus portal where the enrollment letter will be shown. I have been in a really tough condition as my visa appointment is near and VO will definitely ask for enrollment letter.

Is there anyone who can help me in that regard?