After filing my complaint, I was contacted within 3 days by one of Frontier's "special agents" (my term not theirs). He called me 3 times, and also gave me a direct number to reach them, avoiding all of usual inept customer service group.
My issue was resolved within 30 min. Apparently, having to deal with FCC is more work for them than I imagined.
Filing on-line is exceedingly simple, but you should be factual and explicit. https://consumercomplaints.fcc.gov/hc/en-us
If only a few percent of people affected by these problems would bother to file, it might benefit all rather than just us squeaky wheels.
Product or Service Mentioned: Frontier Communications Customer Care.
Reason of review: Good quality.