If your watch is not ticking, make sure the plastic spacer between the crown and the body is removed and the crown is pushed in. Sometimes a little piece of the plastic spacer breaks off and keeps the crown from pushing down. If that's not the issue, and you've had your watch less than a year, CLICK HERE for the "replacement" page. If you've had it longer than a year, replacing the battery is pretty simple. Any watch repair shop should be able to do it. If your moon phase doesnt work, keep in mind that it rotates on a 29.5 day cycle to match the moon phases. If your having trouble with the moon phase or date, remember to pull the crown out halfway and then turn clockwise...it might take a few turns, but the complication should start to spin. If you're still having problems...CLICK HERE for the "replacement page"