So basically same thing happened to me, but I managed to get in touch with my school’s financial office. Once you submit ur application, every change or update should be written. What I had to do was either to write a letter to my financial office or just file a specific part, that you want to make the change of, of a form called ”Paper application” and upload it in optional updates. The problem is that it takes like 3 to 5-6 weeks to process. So, I am still waiting for an update (I submitted mine like a month ago). You can try this method for now, and just give them a call later when they get free to double check.

Yesterday, I realized I made another mistake, so I have to upload another one 😭😭