If the problems are bad enough to write about it on this forum, it has to be severe. Have you cleaned the screen thoroughly? Have you removed the screenprotector if present? If that didn't resolve the issue, it is likely that your digitizer is broken. I have no experience with this specific phone, but the digitizer is probably glued to the LCD. You have to replace the screen in order to resolve this issue.
If you don't have any experience with phone repairs, it would be wise to consult a repair shop. They can judge the problem visually and give the best feedback.