Why do i have water leaking on my passenger side floor board?

What is your question?

I noticed water started trickling down from below my glove department,and every time i turn left,water just pours out,and ONLY when i turn left. I took it to gossett where i purchased the truck,and they told me it was not the heater core but something about the evaporator box and blower motor. Had my dad try to fix it and now not only does the water still pour out when i turn left,but now i have no ac, front windows dont roll down,and none of the inside lights work, HELP