Back Screen is Broken, it won't turn on now. Can it be fixed?

So the back of my Samsung S8+ broke and it won't turn on, we went to the phone carrier, but they said i needed a new one. The crack is near the samsung logo, like to the left side. Please I really like this phone, i just want an answer if it can be fixed or not, and if so around how much would it be to have it fixed?!