Oh no! Let's help you get that back opened again. I'll be providing you with a link to assist with that: http://publish.samsungsimulator.com/simulator/03080ab1-e80d-4103-82f5-8580e0b96559/#!topic/maintenance/emergency_drain the door staying locked is usually an indicator that there is a water inside of the machine. You'll need to access the emergency drain hose and drain the water. I highly suggest having a bowl and towel available so that you can catch the water.
If this doesn't work, don't hesitate to send me a private message so that we can schedule a technician out. http://bit.ly/2ihPL97
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