Century Link Erroneous Billing Practices, Scam into Contract signing Las Vegas, Nevada

I had prism and internet services with Century Link. I disconnected the Prism and I kept the internet service, which went down In September of 2011.  After many repair tickets it was established that under my old account, and due to technical changes Century Link made to the routing, I would no longer be able to receive internet services. The option was to close out the account and open a new one. Which I did. I returned the equipment and went to the store and got new acct number and new equipment. That did not repair the problem. Internet was dropping every 25 minutes and would not get back up for hours. Almost a month went by without being able to get service, lots of troubleshooting and technicians attempting to resolve, we opted to switch internet providers. We again returned the equipment (i have all the receipts to prove) but yet I was billing for early termination on two accounts ($400) in total. Plus billed for all the equipment (although it was returned) they continue to bill for monthly service - and incurred charges. I called on a number of occasions, each of which the hold time was over 45minutes before I spoke to a "supervisor" the supervisors would not listen, they keep saying that the tickets show that the problem was resolved. I asked them to fax it over they wouldn't, I asked if they would call the technician that I spoke to (i only have his ID) they wouldn't. I asked them to call the store to verify that the equipment was returned, they wouldn't. Finally I asked them. I asked them to call the supervisor "nathan" that kept sending technicians to me, they wouldn't.  They were rude obnoxious and  told me that my credit would be messed up if I did not pay the full amount, and that there is nothing to discuss as the tickets were closed. The rip off is that - they billing me for equipment that I have proof of returning. They billing me for early termination on two accounts, but they made me open the second account to see if they could provide a service on a different account.