I have a Maxmadco aluminium bolt action I bought almost 10 years ago. I too dropped it and the bolt mechanism would no longer work.
These are usually manufactured with tight tolerances. Inspect the nib where the refill point comes out of the body - odds are the impact was on this point an the refill can't push past a little indent. Get something refill-sized, bend it back out, and should be good as new.