I changed carriers I dumped Telstra and went to Aussie Broadband for internet & Southern Phones for my mobile phone, my scam emails were cut back very severely providing that the telco's are able to stop most of the scam emails getting to our inbox. Yes I do receive spam emails but they have dropped by about 80%.
I was having major issues with Telstra for several months so I changed carriers I have not had a problem since, what was happening I set up direct debit to make it easier for me (or so I thought) on several occasions the payment didn't go, now I have no idea this happened until I am informed, so Telstra would cut my internet off in the middle of the night, I called the Telstra shop no one answers the phone, So I have to drive to the local Telstra shop when I get there I am asked if I have a appointment I said no, WhenI am asked why I am great pleasure in saying that you don't answer your phone.
Something else that really annoyed me with Telstra was the fact that you had to make a appointment to see them in store this is crap. Going back a few years ago I took a friend to the local Telstra shop there was a lady in the shop who travelled over 75km and they refused to speak to her now that person needs to be sacked on the spot.
I for one will never deal in Telstra again.
The telco's have the ability to stop most of these emails from scammers getting through but they are not interested in doing it. My bet is the bigger the telco the more spam etc you receive. But as I said earlier if you could any doubts you can contact PayPal if you're using them they are awesome they are very user friendly I paid for everything I can with PayPal, for anyone who is unfamiliar with PayPal what happens is when I make a purchase online ie eBay,
I would recommend if you are having issues with your money with online shopping open a PayPal account that way the only person who has access to your finance is PayPal they send the money then PayPal takes it from your account.
I hope this information is helpful