I have been trying to upgrade my speed (this isnt the problem so please read on

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Basically it seems my account isnt set up correctly, even though we have had a cm through NTL for 4 years NTLsaying we have a dialup account and that our MAC address isnt registered. I am going round in circles with NTL, the people on cs have been great but have said I really need to speak to broadband tech support.... this is where I am going round in circles, the guy I have just been on the phone to insisted I didnt have a cm and I had dial up (I nearly lost it at that point as I know the difference !)
So can anyone help me? Is this all to do with the account being relatively old for this service?
HR