2005 dodge darango 5.7 hemi

Hi I have a 2005 dodge darango I purchased about 3 yrs ago from a used license little
dealer ship in are small town it drove fine till one day out of the blue my 4x4 engaged on
me while I was driving it scared me especially when I have my grandchildren with me at
the times it does this. It will engage and disengage whenever it wants no warning even
when car is off you can hear it like a clicking sound.  Finally about a yr ago on top of that
my motor blowed up and couldn't find one forever I had to add on to my loan for the
darango and ordered a motor online for $2,100 plus labor I finally got to pickup my
vehicle yesterday I was excited to get it back didnt even make it home and thr the 4x4 did
it again im so frustrated I dont know what to do I had called an complained to dodge
when it 1st happened and called again today checking hoping there was a recall still no
recall this is bs im making payments on my vehicle and this is costing so much please
help me whats this company going to do wait for someone to have a tragedy im out of
options please if anyone knows anything I can do its more than grateful plz help thanks