I can understand NTL wanting to insist they supply a phone line to new installations of digital TV, but not existing customers, where it wasn't a requirement in their original contract.
Having said that, it may be 'hardwired' into the billing system & the CS associate is left with no alternative - no need to patronise you, though.
You can get details of your feedback to them, & a response, using the form
here
- good luck
