Hopefully they'll help you. I've been dealing with my ISP for years, and they take care of me now, but it did take a lot of complaining before anything changed. They too oversold, and they excused this by stating that it was listed in the legal terms that speed was not guaranteed. I ended up trying to cancel service and switch to a new provider, and that's when they finally stepped it up and looked into helping me out. It took almost 2 months, but they had added equipment around the area to load balance, or at least that's what they said. I've been semi-happy since, but don't be afraid to ask questions or make them think you're cancelling service.
