Why my phone is not charging?

Good day, I have an iPhone 6 plus with a strange problem, The phone doesn’t charge when connected to the charger and when it’s out of battery and you plug the charger, it charges a little and turns on, but once it turns on completely it doesn’t show the lighting logo and the percentage doens’t go up. Curiously, when I let the phone fall 10-30 cm. above a soft carpet, it shows the signal that it’s charging, but it just says ¨1% battery, charged¨, not ¨charging¨

I searched on the forums and found that the symptoms are similar to the ones with malfuntioning fl11 filter, so I replaced it (newcomer on repair stuff), but the problem stays the same, please help!

P.D.: Could it be tristar?