@boitumelodire that sounds like a failed display assembly, which includes the touchscreen. Uses something ;like [https://www.youtube.com/watch?v=UrE3TKhkNug|this video] to replace the display assembly. Replacement screens are widely available for different prices. Do an online search and select a vendor that appeals to you.
While you work on your tablet, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.