[1999MUSTANG2000]

When i press the call button it presses j and k when i hit the end button m and n and the trackball hits h and l and the a button hit d and o...what could be the cause of this i have a new keypad and trackball on the way could this fix it? the water tag in the battery compartment is completely white and i cant return the phone because i got it from a friend. thanks in advance guys and girls.