@nebaaman time to replace the display (which will include you touchscreen). since iFixit does not yet have a guide for this, use the one [https://www.sosav.fr/guides/mobiles/samsung/galaxy-a30/ecran-complet|from here] Replacing the screen on this model is best done with the mid-frame as shown here. Make sure that your replacement is a complete assembly as well. Something [https://www.amazon.com/Cellphone-Screen-Samsung-Digitizer-Assembly/dp/B0BKZ8FSH7|like this] Example only.
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 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.
***Repair is War on Entropy!***