The most likely thing that has happened is that, because the shutter didn't initially complete it's travel, the wind lock hasn't been reset so you can't wind on the film. The shutter is uncocked so pressing the shutter release does nothing. You need to manually release the wind lock.
Here's how you do it.
Remove the base plate of the camera by first removing the three screws that can be found around the film rewind knob (lift the lever and you'll see the screws underneath, you need to rotate the knob to get at each screw in turn).
Now remove the other two screws that hold on the base plate.
You'll now see this.
The lever marked red needs to be pulled slightly to the left (as looking at it here). Just enough so that the switch (marked green) is pushed in. If you pull the lever too far, the lever will go past the switch and will stay in that position and the shutter won't fire.
With the lever pulled out a bit, the wind lock will be released and you can then re-cock the shutter. Once you've done that and then fired the shutter, everything should then get back into sync and will start to work again.
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