Hi Julia. Welcome to justanswer.
Remove the power cord from the wall outlet and leave it for 10 minutes. Then again plug it back and turn it on. Check if the issue is still there or not
did you try the procedure yet and can you report about the results please?
I can issue a refund for you, but I am not sure why you would not try the procedure recommended first, so that we can try to solve your problem?
I´ve opened a request for a refund for you with my moderators, should be with you shortly.