that sounds unfortunate.
try removing the battery and using it on your camera. Does the battery meter show full charge? If yes, do try to use this battery heavily, and then see if the charging is normal from the second time onwards.
* if you find that after few hours charging, the red light doesn't go off, but the charge inside can sustain for few hundred shots, then it's not really a big deal. Don't get so worked up over a little red LED light