Caller: Male who spoke with Indian sounding accent

Knew my surname. said he was Optus broadband problem fixer. Told him I am with Telstra (which I'm not) He replied it didn't matter as he fixed all the services. Then asked me to get onto my computer and he would guide me through the NBN repair process. When I acted like I was computer illiterate for a while, He became sarcastic and abusive and hung up