Mitsol bad service

I am really unhappy with how mitsol treats their clients.

I have been with them just under a year using a wireless router, everything was working and my internet was next to perfect.. Since December 2023 it's been getting worse and worse. Firstly you have to email or call in which to me is unnecessary being the year 2024, why aren't there more options for communication. Secondly I'm told well if someone close by has gotten internet then it will make my internet unsteady because it's wireless. This makes no sense to me. I was also told that my internet would be bad without a wire??? I asked how to improve this and they can't.. This just doesn't add up.