need help before i cut my door into pieces

alright where do i start, after trying all day to instal my shave door kit, 1 door only, took me so long, so i FINALYL got it working....i accidently put the lock and thought, oops, no biggy i'll go in through the other door and open it. well i tried and the lock wouldnt go open, i tried pushing down on the levers inside and the lever from the one that goes to the key from the handle NOTHING, i trying messing with the mechinism inside and stuff nothing, the lock will not unlock, shits pissing me off, im about to cut the door in pieces tomorrow if i dont figure out what to do. i cant do much, the doors is CLOSED, and i have little room to work with inside the cab. FUCK i just wanted to shave my handles