Have you ever considered why it’s difficult to report someone else’s line as out of order ? , you may know your mother definitely uses BT , but what if this were a somewhat distant relative and they had changed providers , but you were unaware of that , you would then be calling a company that has no relationship with the number you are reporting, even if the correct company is being called , part of reporting a fault comes with a compulsory warning about charges if the problem is outside of the providers or Openreach network, as an example, the customer gets a new carpet fitted , the carpet fitter drives a carpet gripper through a cable that services an extension, this causes a fault on the ‘line’ that causes permanent busy tone, a relative or friend can’t get through , they call BT to report that , reporting a fault comes with a warning that there is a possibility of being charged under these circumstances do you agree ?, as a third party does your consent count, if charges were applicable, the person being charged may say , ‘I’m not paying that, because I never agreed to that , no one warned me ‘ , which is true , if you are not the account holder you can’t provide that consent .
