Replace coaxial cable
They would not be stapled in conduit anywhere in the world.
Check very carefully that you have found both ends of the same cable/conduit. The most likely reasons for &quot;being stuck&quot; are:

that you have the same cable, but you've missed a spot where it comes
out of one conduit and goes into another (possibly being attached to
something),
or you have two different cables and the other end of the one you are trying to move is fastened to something outside the conduit,
or you've missed a &quot;pull point&quot; (removable access cover or junction box) providing access to the cable inside the conduit so that you're not trying to
pull it around more than 360 degrees of bending.

Typical access points involve a relatively sharp bend which you will NOT be able to pull around, since you are supposed to remove the cover and pull from the open access point.
If you think you have eliminated those possibilities, you could put a vacuum cleaner (wet or wet/dry type - a &quot;shop vac&quot;) at one end, and verify that you really do have the correct conduit at the other end by noticing the air getting sucked in there, and then you could apply some wire pulling lubricant to the open end, and allow the vacuum to pull it into and through the conduit. That should help the wire to move, if it's not actually bound up by a sharp turn at an access point you have not opened to pull from.