Why is my S7 edge screen black after software update?

My S7 Edge had a fall almost a month ago that resulted with a few streaked lines across the display but no cracks. It was still manageable and my intention was to get screen protection to slow down the process of getting worse.

I hadn't quite gotten around to doing that when I was till using the phone normally after-which which it asked for an update which I permitted.

After the software update was complete, I noticed the screen began to act weird (display kept vibrating vertically) and then like 5 minutes later the screen just went black although it still showed that the buttons were working.

I factory reset the phone hoping that would recover an initial version of what I was managing but I think I must have done this while the phone was still on and now the phone would not even respond.

Please what could I do at this point? What are my options?

Thank you