2014 Cadillac CTS starting problem

I have a 2014 Cadillac CTS and
when I turn it off it won't start
back up again. I've had the body
control module replaced and
flashed I put in a new battery and
it still does the same thing I don't
know if it's the key just not
making a connection or what.
Sometimes it'll be okay other
days I'll know when it's going to
start acting up because the
windows won't go down comedy
AC will be on but won't light up
also there was a recall for that
vehicle for an unattended ignition
key rotation and I don't know if
that has anything to do with it. It
has 108,000 miles on it. I've had it
into the shop at least four times
and it still does the same thing is
there anything else that it could
possibly be that they're not
seeing? I'm a female and
definitely not a mechanic so it's
getting a little bit expensive now.