I just received a call from my half sister. They are with Vodafone for internet.
She told me an Indian man called asking for her mum, saying he was from Spark. Because she wasn't home, he asked whether my half sister was a family member; replying yes, the man continued. He said that their internet would be shut down for two months because of some reason (something about spamming/sending packets, didn't quite catch her -- she probably did quite catch what he was saying either).
He then said if she didn't want the Internet to be disconnected, she would need to turn on the computer - I presume to go to some dodgy website where he would gain access. Because my half sister was smart enough to say 'nah, that's okay. Disconnect our Internet' he didn't get very far.
I see no other thread where this is raised, so I thought I better inform you guys, and perhaps someone from Spark can confirm that such a scam is being conducted.