Caller: a woman saying she is from telstra

The woman say if I switch to telstra mobile plan, I can get 1/2 price of my recently used plan, and with $800 off on a new iphone or $500 off on a new ipad. After I asked her to send email for details, nothing follows other than on the second day I received another scam call from a famous number (02) 9000 7008.

This number appears from a tiny town in the bush western side of NSW.