DSL Extreme "not what its states", will over bill you and just a little faster than Dailup, Internet

DSL Extreme is not what its states. Not very fast for being a DSL service, just a little faster than Dailup. I canceled due to a number of problems but the final nail in the coffin was the pricing.
They stated one price and like a Dummy I paid a year in advance to get a lower over all price. After the year was almost up they came back and stated a balance was due and the price will being going up "Almost double in price". So I cancelled and return their modem as requested.
After a while they stated I never returned their modem and will be billing me on top of the other charges in question. Lucky they record their phone calls, after a number of calls and requests in writing they failed to show why a balance was due. After talking to a number of people I requested a floor supervisor pull the phone recording and play it for himself.
At that time they backed off the over charges but refuse to back off on their modem (which I had no use for) and to return any over payment . The new service supplied their own modem and I had my own Router.    I refused to pay for something I returned so they sent it to a bill corrector and they have been hounding me ever since.
Reasons I cancelled
1: Slow speed
2: Pricing is not as stated


3: Tried to bill for more then was stated at end of contract
4: Service was down far to many times
5: Help line was slow and over 50% of the time useless
6: Tried to charge me $100 for a $20 modem that I returned
7: After a number of years they are still trying to get that $100.00
8: They state a Free modem but its a lease, look at the fine print. 
9: They refuse to refund any over payment.
Once again DSLExtreme is not what they state This is why I keep records See below (this is a cut and paste from my records).



support@dslextreme.com wrote:

hello, I show you paid up front for the year of service in advance. So, Instead of charging you the early termination fee of 250.00 we went ahead and cancelled your service with out penalty, Your cancellation date is set for 3/7/2008 so there for you have 30 days from your cancellation date to return the modem. Please contact us at 1-800-774-3379 if you have any questions, Thank You Pearl.p -------Original Message------- To: online_order@dslextreme.com From: xxxxxxxxxxxx@yahoo.com CC: xxxxxx x

Date: 3/9/2008 11:44:39 AM Subject: Re: Your Cancellation Date I'm confused, if you cancelled my service March 7 but I'm paid untl June - why do I have only until April 6, to return a modem (that I never used in the 1st place because I had my own wireless modem) ?? DSLExtreme Cancellation wrote:

Dear Xxxxx Xxxxxxxx This email is to notify you that we have a cancellation date for your service(s). Here is a summary of your Cancellation Order: Account#: xxxxxx Address: xxxxxxxx xxxxxxxx Ave , xxxxxxxx, CA xxxxxx Phone Number: x xxxxxxxxxx Cancel Date(s): SBC $17.95 384-1500/128-384 Residential Dynamic DSL Annual Promo - Mar 7 2008 Since you have a DSL Modem Lease from DSLExtreme it must be returned within 30 days of your cancellation date. A temporary invoice of $99.90 has been placed on your account. If the modem is not returned within 30 days you will be charged for the modem lease. You can send the modem to the address below. We recommend obtaining a package tracking code from your shipper to ensure the shipment arrival.



Why would they recommend tracking a $20.00 idem that was stated in their adds as free and why bill before cancellation date plus 30 day return date.