In which case you will need to stick with what you have got.
What is the intent of terminating the telephone service - which is a part of the current contract, be that provided by Plusnet or a third party, for it forms the primary identity and infrastructure over which the broadband service is delivered.
Depending on the intent, there might be ways of moving to another supplier (EE or BT) and avoiding ETCs, but any change will dictate a new contract.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
