you'll be best of just waiting, linseed oil can take ages to harden. Like, months. It depends on the kind of oil, wheter it has been boiled, and wheter sikkatives have been added.
If it is still sticky, it has likely turned into a matrix of partially hardened oil and still liquid oil within the matrix. you can press out the liquid oil by rubbing the shafts firmly with some leather or your hands. put be careful, the hardened oil may come off in glibbery little pieces, try not to rub it off.
Other, you can put the shafts in the sun to accelerate the hardening. That's what I'd do. And wait.
Linseed oil is for the patient, but it's great stuff.