Caller: They claimed to be telstra

They called twice, I picked up second time and they claimed to be from Telstra and that there was an issue with my account. I don't have a Telstra account. My instant assumption is it was a scam call.

Caller: Apparently Telstra

Wanted to verify who I was. Told them they phoned me so they should know who I am. Kept arguing they wanted to send me a code gave them a false name. told them not to call again and stop spamming. Said there was issues with the line as it was under maintenance.

Said they were from Telstra. My account was “under maintenance”. Insisted I verify I am the account holder so they can send me a code to upgrade the account.
I said I don’t believe you are from Telstra - I think you are a scam call - and will block your number.

Called me twice, and I missed it. On purpose. My phone informed me it is "suspected spam".