My iPhone has a cracked screen and coloured lines.

So my new IPhone 7 plus was recently damaged and I do not know what to replace. I had cracked the screen a few weeks ago and it worked fine- button functioned, could use the phone perfectly. I had recently dropped the phone and coloured lines and weird black shapes and had appeared on the screen. It is now unresponsive and has more cracks then before. Any ideas on what to replace and maybe the cost? Is this repairable?

Thank you

A pic has been provided to help with description.