unplug the machine and remove two small screws on rear of the machine that hold the top on. take off the top and place to one side. the rear of the latch is now available to you from the insude. reach down and push the latch to the left hand side to relaease it. door will now open. order replacement part as you are unable to fix the plastic latch which is a weak point and has now snapped - uk cost c 13 gbp see here http://www.buyspares.co.uk/washing-machine/a1635uk-27051/door-handle-kit/product.pl?pid=47119&shop=ariston&path=76567&model_ref=502948
replace damage part is easy as pulling out the pin and rpelacing with new latch. Good luck!!
bongoblu
June 2010