This is a fraudulent line, They claim to be from Telstra, and they are not. Should you answer it, it states that you have a Telstra account and your internet will be disconnected. I spoke to the operator, and she said that to solve this, she will give me a unique and secure URL link , DO NOT TYPE THIS INTO YOUR COMPUTER. This is a fraudulent line and do not take the call. Hang up or don't answer the call.