unless you can buy a replacement screen, there isn't much you can do
have you contacted the manufacturer or a phone repairer to see if replacement screens are available for purchase ?
The screens themselves are a non repairable item and just get replaced
You might look on ebay for a replacement. Although most of the screens on there will be fake china stuff. If it's a Iphone have a look at this. That site has some great guides on opening a Iphone.
