Internet Upload speeds

Once again, I am back here due to the Internet upload speed randomly dipping when I am trying to stream, and I have originally posted this before, talked and thought it fixed, sadly it turns out it wasnt, on the 3rd of this month (January) I was live streaming around 6pm not too late nor too early, however my stream dropped frames became apparent and I instantly tested it and low and behold my upload speeds which are typically at 40mbps is down between 5-20mpbs, I am not saying im upset because the first time i was sure they helped, however it seem to be a temporary fix, so im thinking i might need someone to come out here and fix and or replace wiring but im not sure but I am genuinely getting upset cause i know when i first started streaming her, i had fantastic speeds no matter what no dips or anything but it seems like the moment i got my own compatible modem and gave back yalls, ive been having nothing but issues, like genuinely this is hurting me, im paying around 300$ already i would assume i would get the best from you lot because im paying for both ultimate tv and possible the highest tier for internet.