I got a call from them again last week (this has now been going on for over three months) and a call center operator actually spoke to me (her name was Kim). Her script she read was for Plasma Mobile. I asked for their switchboard number first, she said it is 021 418-0267. I tried to ask about a relationship between Plasma Mobile and Woolworths and she told me she has a script and cannot deviate from that; then prompty hung up on me.
I wonder if Woolworths are selling their customer details onto Plasma Mobile or if the details are simply being stolen and abused? I notice that WFS and Plasma Mobile have similar addresses?