i had a similar problem with a hoover washer, i used a long flat screwdriver and a hammer and broke the plastic (standing out a bit) with care ? after a wile a could see a metal bit silver, i used the screwdriver and open it by pushing it to the left or right side, depends on the door opening !
a new door lock u can get from the net, fixing is easy ones u have undone the door u can then undo the lock by holding it with one hand on the inside and fix the screws on the outside ! ok that,s all !
wolf, July 2014