Skybeam still AWOL

My troubles with Skybeam, my ISP, continue. Some time prior to Dec 8th, my 5 Mbps download speed suddenly became 2 Mbps. That’s too slow for YouTube videos and many other things. I’ve called over a dozen times. I keep getting the same answer: they’re working on it. And working on it. And working on it. Today I was told that their top network engineers were on it. Well, apparently not “top” enough. Still broke! Do they know their own network? I don’t think they do.