Before you spend money at a panel beater try this!
> Pull out the door handle and undo cup screw
> From here you should be able to feel if the plastic door lever is connected to the metal door opener rod (I assume it wont be)
> Pull the rod with pliers and the door should open unless you have a serious problem
> Once doors open take off the door trim and find your problem
> Have a beer because a sixteen year old teenager most likely just saved your money from a panel beater
(: