You may have killed it when you began using it again. By the sound of things the keyboard fault may be due to moisture that remained.
The correct procedure (a bit late now) is outlined here: Got Your BlackBerry Wet? - BlackBerryFAQ
You may wish to replace problem parts to see if it fixes the problems, such as a new keyboard, although this does not guarantee to fix it.
You can buy parts from places such as ebay.