Maybe try googling it first. Quite often you can find how to use and trouble shooting videos online that solve so many problems

I have seen one that shows dark at night and sunshine in the day time. It doesn’t play music at all though. You have to set the times in it. The one I know the screen is dark at night and gradually changes to soft yellow, then bright yellow. The little one knows that if he wakes up early he has to try to go back to sleep. He is not allowed to get out of bed unless he needs to go to the toilet. They started using it when he was still in his cot as soon as he started walking. As a small baby he had a little toy dog that he could squeeze and music played.. They say you shouldn’t have toys in a cot with a baby though…..The night light you have may have a sensor in it. The time is definitely not set each night. It is automatic. It looks bright yellow during the day and gradually goes dark every night.

No advice but can you to try return it if what it states is not working?