Hi there
π the symbol indicates that something is wrong with charging port or charger itself.
Have you tried to change different cables?
If so try press and hold power and volume down buttons simultaneously till samsung logo appears.
Also it seems like your phone is quite in bad shape might be worth bringing to samsung experience store if you have one close to it or book a repair.
I guess it might be due to multiple factors like USB port damage as well as other components of your phone. (As from the picture provided)
I'd strongly recommend to get in touch with samsung customer support ir book a repair.