Hi,Welcome to Just Answer, My name is XXXXX XXXXX forward to helping you today.
Do you have the full model number?
Okay, you will need to get the door unlocked of course and when you do you will need to replace the door lock assembly, the first thing you will need to do is remove the top of the machine there are screws on the back remove the screws and slide the top back, then lift it off you will need to reach down and you see the white plastic part with the hook on the door latch/lock I showed you above you need to pushed that little latch in to release the door, once you have the door open you can replace the lock assembly, and get you close out in the meantime. I am including a link to order the part, click here
This will take care of your issue, thanks and have a great holiday season, Bryan