If it's truly stuck than the only thing you can do it rip it open and hope that it won't cost a lot to fix. My guess for a repair that small would be right around $40 or so. I'm sure your KIA dealer might even take care of you for free if your car is still under warranty. Figure out If your under warranty or not. If your not than just rip that sucker open and take it in for repair. You got to put in gas sooner or later right? Who knows... You might even be able to fix it yourself if your a handy guy.
