Anyone who might have the same situation, i found a simple, but effective solution, not sure if it works on every xiaomi device, but i will write down the steps here:
You need to use XiaomiADB, here is the download link and the description for how to use it -> https://xiaomiui.net/how-to-use-xiaomiadb-8044/
(if the page is not available, then feel free to msg me!)
For xiaomi adb, you need to go to 3rd option on the miui recovery screen, NOT THE FASTBOOT
So basically i went through the steps to “xiaomiadb sideload_miui <filename>”
And I tried to install a rom, BUT IT DIDNT ACCEPT IT!
The message was:
ERROR: This rom cannot be installed, server code -> 2001, server message -> Can't install unofficial rom
after trying 4 times all the same and: Installation of this rom via stock recovery is not allowed by Xiaomi
Says Installation failed,
and then i just decided to download another rom so i PLUGGED OUT THE PHONE
right after this, and went to another room to connect to wired network, to download and try a different rom... when i came back, to all my surprise, the phone was turned on, so i went to the setting dev ops and enabled bootloader unlocking, linked it to my account enabled adb and everything that is needed to flash another rom later, so then i rebooted and again, miui recovery 5.0 screen, but now i enabled unlocking, so i put the phone in fastboot, and tried MI UNLOCKER TOOL again, now it says: Please unlock 168 hours later. And do not add your account in MIUI again, otherwise you will wait from scratch.
So that means, after 7 days i wll be able to unlock it, until then, i can turn it on with the above method, in short try to sideload (copy and install) a rom to it, and then after it failed, plug it out and just wait like 10-20 maybe 30 seconds and bam your device is normally booted... I hope it helps to some of you, (i have been searching for the solution for almost a week, my other option was to pay someone who can MAYBE do it or send the phone back to china and pay the repairs, so im really happy with this method! If it helps to you, please reply so i and the others will know that it worked! Have a nice day!