I had a similar experience with MegaPath. One day my DSL went down and never came back up. I called support, no answer. 2 days later still no answer. I canceled my serice on their website and called Century Link for service.
Months go by, and I start getting mail (physical and email) from "Global Capacity" telling me that my account for DSL service is overdue and my service will be suspended if I don't pay. At first I ignored it thinking it must me a scam because I never heard of the company.
I get 2 more in the following months, the ammount they say I owe them still increasing.
I call Century Link, why I've had service from for months at this point, to confirm my bill is paid in full. It was and my service was not at risk.
Finally I break down and contact them. They explain to me that they purchased MegaPath. So I go to MegaPath's website, which is still online[1]. There's nothing about being purchased to this day. After searching around I find they did indeed purchase Megapath[2] -- AFTER my service went down and I canceled my account!
Global Capacity are still threatening to cancel my service -- which I haven't had in about a year now. Every bill increases according to their monthly service fee. They also refuse to negotiate or admit that I canceled my service prior to their purchase of MegaPath. I don't know what to do at this point.
I have a feeling that Megapath was failing horribly and Global Capacity received unmaintained information from them. Either that or Global Capacity is a fradulent organization. Haven't decided which yet, but it may be a little of both.
[1] - http://www.megapath.com/
[2] - http://info.globalcapacity.com/global-capacity-acquires-mega...