So you sent them a diagnosis and they immediately began threatening expulsion and cancelled your scholarship? Make sure you have records of all this, write down a timeline of events. Back up your data/evidence electronically and print some physical copies if you can. Including anything from 2019 when this started, and any forged/falsified documents they have sent you.
If you have an email specific to the University, like an email address hosted by the University, go right now, make sure you can still log in, and send a copy of everything there to your personal email account.
Is there any chance of you getting professional legal advice? Someone who might be willing to take your case pro bono or at a reduced fee, if you don’t have a lot of money? You may also wish to post somewhere like /r/legaladvice or /r/legaladviceBrazil on Reddit, you can make a “throwaway” anonymous account to post there. Google “legal advice Reddit” or “legal advice Reddit Brazil”. The people there cannot strictly give you binding legal advice in the capacity of being your lawyer, but they may be able to give you more specific advice for how you can approach the situation from a legal perspective.
And yes, I don’t think Belial takes kindly to people who abuse their power, so ask for his help in finding the right people to assist you with this.