Sorry to derail a bit but most storage lots do not have security cameras outside or in working order. If anyone is thinking about storage lots, have them show you the exact camera angle, color or B&W, taped or just live feed and dpi. If there isn't one close by that has a working system it's always worth it to install your own, many will give you an alert with a live feed directly to your smart phone or tablet now.
As for your door, is the door straight and not slightly bent as well? Not quite sure about the "trim", if its the metal part and you don't want to spend money at a shop (though I'd check into that), you can try with a ball pein hammer and a block of 2x4. Just tap gently then put a level against it until its straight if that is what you are referring to.
Don't think I'd try that on the door though, if its bent contact Heart Land to see what a replacement would be so you have the right door.