Hi, guys. There’s an update on my situation, I’ll explain it as it is.
After a very long research process, it turns out there’s only one real option right now: you pay between $180 and $300, wait about a week for a slot to become available on a Chinese EDL account, and then a technician connects to your computer remotely and fixes the issue in about an hour. This applies to trusted services with a good reputation.
There are cheaper options, but in about 90% of cases those are scams, and you can easily lose your money.
As for the suggestion to use the warranty, I already tried that. Since the device was purchased in China, it is intended only for the Chinese market and is not officially supported or serviced outside of China. They politely refused and told me to contact the store where I bought it and physically bring the phone there. That’s the only option they gave me.