You don't need a gadget to retrieve your film.
Try this:
1. Cut a narrow (1" x 4") strip of clean, regular stationery card stock (a 3x5 or 4x6 card is fine).
2. Place a piece of DOUBLE-STICK cellophane tape, about 1-1/2" long, on the UNDER side of the strip. Assuming you are right-handed and that you are holding the film cassette in your left hand, the sticky tape will go on the LEFT side, bottom edge, of the underside of your card strip. So it's aligned with the far left edge and the bottom horizontal edge of underside of the card strip when you hold the strip horizontally.
3. Gently insert the sticky end, sticky side down, into the felt lips of the cassette. You need to be patient and slowly wiggle it into the cassette, at least an inch.
4. Now, slowly turn the "rewind" knob on the bottom of the cassette, as though you are tightening up the wound film. Unless you have really over wound the film's leader/tongue, the sticky tape should catch that film tongue and it will start to pull the card stock strip into the cassette.
5. When the card strip is about 1-/2" - 3/4" inch inside the cassette, very gently start pulling the card stip out, trying to put some fingertip pressure on the part of the card stock that is right up against the felt lips. The film leader should come out.
6. If this fails, try again--always with a fresh piece of card stock, and fresh double-stick tape. Also, be sure that the card stock strip is not so narrow that it bends too easily as you insert it into the felt lips. Another possible cause of trouble is that the film is wound too tightly inside the cassette. In that case, try turning the protruding knob in the opposite direction; banging the cassette on your palm or a padded surface also helps loosen up the film before you try again.
This should work! My Olympus Stylus Epic always winds the film leader inside, and I have fished out countless film leaders over many years using this method. The little purpose-made gadgets work about half the time for me (and I've tried them all), but this method works when they fail.
Good luck.
Pat