Slow Fibre

I am on a 100 MBS download fibre package. Since March 2919 i still need to register this speed on any test app downloaded from the internet. Sometime i get a "feeling"that they are throttling me but when i ask that question denial is all i get in return. I have complained about the service a couple of time and then suddenly the speed goes into the top 80's. After a couple of hours it goes back to the 30's and 40's. I am fed-up especially during the lockdown period when the whole family is online and speeds are very slow. I was promised that a customer service consultant will be in touch with me but after a couple of months i stopped waiting for that call. I am very disappointed with this service provider. My opinion is that they are "*****ing"legally from their customers using intelligent software that "takes" their customer's bandwith where they can and routing it to other customers.

I hope they can prove me wrong!