How do I get my electrical back working on my passenger side front and back?

What is your question?

I have a 2012 GMC Yukon Denali XL and somehow my sister mess with something underneath the driver seat which cause the right side on the passenger side front and back to lose electrical. I can still unlock and lock door on the passenger but I can't get the windows to go down at all like when you press down on it nothing happens even the seat warmer on the passenger side doesn't work as well. What can I do to fix it? is there something I need to replace or is there something i just need to reconnect to get the electrical back working on the passenger side?

What makes this problem better or worse?

I mean it just doesn't work at all like you get no action or response.

How long has your 2012 GMC Yukon had this problem?

for about over 3-4 years