I'm hoping the recent CenturyLink/Minnesota situation gets more scrutiny over telecom bills. You may find this to be relevant [0]. I work in telecom and CTL is one of our vendor partners, I feel like I'm on the phone with them at least twice a week raising flags about billing statements.
[0] https://www.mprnews.org/story/2020/01/08/centurylink-to-pay-...