Thanks so much Salome for giving everyone a warning regarding this:
Just a heads up I just had a phone call from people claiming to be telstra saying that they could reduce my monthly bills because I have been a customer for years and they valued customer loyalty. All I had to do was provide them with my license, Medicare card and bank details. I rang telstra back and asked for clarification and as I suspected it wasn't them. Please be careful who you give your info out to and if it sounds too good to be true it always is!