The way you handle this situation is by dropping a mixtape yourself with a selection of those tracks.
Then in 2 months drop another tape. That collectively should have the audience fed for a year or more.
Abandoning these leaked tracks overall will actually have far fewer people getting to listen to them. People always come back to the official tapes or albums because they're easier to find and the songs are there instead of needing to be hunted down. You'll also lose out on money if you don't commercially release the music.