S7 slow charging/doesnt fast charge/not reading otg usb connectors

So i have this s7 edge that my aunt gave recently and i think that its in a very good condition. No major problems and almost not damage to the body at all ( just a single crack on the back of the phone). So the problem that i noticed is when i charged the phone at 50%, it says that it will take around 3hrs and 20 mins to fully charge it, and its even using the fast charger adapter and a decent belkin charger that im using on my old note 4. I tried to transfer files from my note 4 using an otg and a usb, it worked on the note 4 but when i switch it to the s7 edge. It doesnt detect it. I even tried to connect it to a pc but it says that its unrecognizable. PLEASE HELP MEEEEEEEEE :( (I think the charging port is the culprit)