How to Fix Tab E8 charging port only working at an angle if lucky?

My Lenovo Tab E8's charging port only gives charge to the battery at an angle, but only sometimes. I've tried many times using different chargers to no luck. I want to avoid changing the charging port at all costs but I am 99.999% sure the charging port is broken.

The reason the charger port is probably broken though is the fact the Tab E8 used to be my sister's and she stopped using it before she got her Samsung Galaxy A03s, and after she got the phone, she just gave it to me. I do know how to pop off the back though (basically like the Lenovo Tab 4 8).