I already changed the charging port but still not charging

first of all check your charging adapter and cable the best way is just charge another phone with it (charge it about 15 30 min) if its charged ! well then fine its not your adapter the second thing that is maybe its not about your charging port maybe the problem is battery that is dead ! galaxy s9 support wireless charging if you have that charger you can test with that if its not worked the problem is battery but if its worked and charged the phone the charging port you changed maybe broke or not a original and it made of china or something like that because they are cheaper than the original and they destroy after a while sometimes they are not working too. after all if you sure about your battery and dont have wireless charger to charge it then you need to change your port again, (if you change the port by own skill take it to repairers to check it out, if your not well then change that place that you replace your port and show it to someone else) hope this helps