Samsung A5 dropped on back and screen is now black

Samsung A5 dropped on back and screen is now black

Hi. I dropped my Samsung Galaxy A5 on its back and the screen turned black. I can hear the sound when i get a new message on WhatsApp, but the screen is always black. What should i do ? I can't remove the battery then put it back again because the cover can't be taken off. Please help i'm desperate !