Who called from the number +44 (129) 560-5919

These people have been calling for days posing as NBN Telstra trying to give me and others a $879 refund as we have paid too much on the bills as they have automatically taken the money. Only problem is, is that I don't have automatic direct debit and know this scam. They are definitely Pakistani but have Aussie name's and it's a brand new guy ringing me who is forgetting he's supposed to be Australian and speaks in Pakistani when he hangs up. His first call started with "What do I say?" to the person training him. You could tell that he was badly reading his script. Someone rung the other day pretending to be David Miller who can't read the script properly. Then the other David Miller rung again today but I'm not playing their game and they are starting to get really annoyed and hanging up on me without saying a word now. They are calling from many different numbers so that I can't block them. This has ONLY happened within 24 hours after I updated the Do not Call register. The other numbers that they are calling from are (03) 9929 9224, (02) 4425 2862, (02) 4359 1599, (02) 4296 2125, (02) 0498 0810, (08) 9964 2929, (07) 4122 4946, (02) 6968 5058, (02) 6644 6964 and (02) 9418 4920 so you can't block them. But I'm sure as I mention that they are breaking the law and will be fined they will come out with something vulgar like they do and not call back. If they had called my home phone they wouldn't be able to get through as it's designed to stop scammers in their tracks.