These people call every day around the same time. Don't normally answer, but did both yesterday and today. They say that they are from the NBN Department and that they have had several complaints over the past few days regarding internet speed in our area. Free service they say and they want to help improve our speed. Told them both days that our speed is just fine and hung up on them. Both time they have been NON Australians and extremely hard to understand. They also call from different numbers