@heli8138 there is not a whole lot that you can do. It is time to replace your display. Since iFixit does not yet have a guide for that use something like [https://www.youtube.com/watch?v=B2vcBueSCAc|this video] Replacement screens are readily available at many online sites.
While you work on your phone, 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 a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.
Repair is War on Entropy!