Caller: "Nicole from Telstra" (Robotic voice)

The robotic message says that your phone line and internet is going to be cut off because there is now NBN available in your area. Click 1 to talk to a technician. We've been receiving these calls every day for a month now, and we still have internet and phone connection. When I ask the "technician" to be taken off their call list, they either hang up on me or just keep repeating that they're from Telstra technical department.