my phone's charging port has been touching. I have to turn to an angle or twist the cable before it will charge and I need to change it. I want to know if changing the charging port can affect my charging speed. it's type b btw.

Yes it can
A fake charging port or even a good one incorrectly mounted can results to ur phone losing its USB functions.
Meaning- you might not be able to connect to anything PC to transfer files or tether
You understand what I mean.
Ontop of that... Your phone might charge slower.
Ensure the engineer fixes the charging port very well with all the legs properly connected.

PS. If you end up changing the downboard.. do well to test your mic, screen responsiveness, charging, and of course charging.
If you encounter any issues, politely talk to the engineer.. sometimes smartphones misbehave