at the bottom of the door is a plastic insert,which might have fell inside the hollow door, if so, your local hardware store(TRUE VALUE) carries replacements for this. they come in diffrent sizes so save ALL parts until the job is COMPLETLY done and you are satisfied. it is kinda a job for a contorshunists but you will be able to put something under the door to hold it up, then adjust, and lower door, if more adjusting is needed, repeat steps..hope i helped. good luck.!!