I saved its seeds on txt file in my PC like a fool.
Please change the title: your Ledger wasn't hacked, your PC was hacked. Or someone got physical access.
~snip
It's high time to do this: rename this topic. I came here to read full of intrigue, how Ledger was hacked, but it turns out that the matter is OP's carelessness and negligence. Undoubtedly, this is an unpleasant event for him, but OP himself is to blame for what happened. People like to remind the slogan "not your keys-not your money", but they forget that own keys first of all imply personal responsibility for their finances. Ready to be your own security service - that's when you
play with crypto.