You’d be better off using a press to remove the axle from the hub… it’d cause less damage (and take a lot less time) than using a hammer… To use a press you’d most likely have to unbuild the wheel.
All this being said, there’s no guarantee that the new axle will make a good fit with the hub… in the process of pushing the bent axle through the hub, the hub may be deformed… it depends on how your axle is bent.
Why are you so scared of rebuilding your wheel? It’s probably a good idea to do so after subjecting the wheel to whatever forces that bent the axle. Is your wheel still true after bending your axle? Are all your spokes still under tension? Your rim will be the next thing to go if you don’t check it out…
Sure, wheel building takes time and patience, but it’s a good skill to learn… if you’re truly lazy or pressed for time, a good bike shop mechanic can do the rebuild in an hour or two.
its called technique not smarts, learning technique is smarts tho i guess.
in any case you should send it back, i hear the cartel does round trips quite often, how do you think we get all this P here in NZ? just ask one of their mules to carry it for you to the states