Presumably spam. Purporting to refund an amount to my account as resolution to an "Optus dispute", and a link for Help. No moniker, so immediately suspicious.

trying to get money out me...

I dont know what this is but they have charged me 30.00 so far they sent me a txt

<OZchat> Freemsg: You have subscribed to OZchat for $3.00 per week. Your personal link is http://www.lateralnz.com/wapchat2/home?uid= Help: 1800 252 815