If the connections to the tip have broken inside, you need to find someone with a very fine soldering iron that can solder them back on. Otherwise, one can take that end connector off and solder a USB wire directly onto the PCB board.
In any case, this sounds like it's a job for someone good with electronics (PCB soldering).
Maybe you can try to bend the tip back, though I doubt that would fix anything.
As a lesson for the future, ALWAYS have backups of your files. Have them on your hard drive (home PC, laptop, etc), email them to yourself or put somewhere online, put them on CD or DVD, etc. Don't rely on a single storage place ... ever!