Purchased wrong item

[Pleasurable]

A GM should be able to restore it, but as others have mentioned, it's quite literally one time only.
I've made a couple mistakes here and there, but unless it's something that's going to set me 3+ weeks back, I'm not going to bother with a GM. If anything it's just going to make me go level/gear up that new job as well.

It takes 3 weeks to obtain the necessary tomestones to buy a weapon; which is what I'm saving my tomestones for. I'm perfectly fine with using my one-time item restoration for this.

The esoteric gear is my end game. I don't don't do EX primals or savage content. I can't obtain hive weapons (Or this would be a non-issue - The hive weapons are an acceptable difference in power compared to 180 weapons that it is a non-issue), so I can only obtain new gear through this system.

[Canadane]

It takes 3 weeks to obtain the necessary tomestones to buy a weapon; which is what I'm saving my tomestones for.

Except you've only set yourself back by 1.
You didn't blow 3 weeks worth of tomes on the wrong weapon.