Keep receipts of what you buy and match around the dates and $25 obviously. I thought at first TS was Telstra perhaps and thought it was 'No Contract' with an r as in pre-paid mobile phone, but that's silly as they'd just use Telstra Pre-Paid, then again WW & EDR has a pretty coughpy website, so I don't get surprised by the weirdness of WW, EDR and HSBC anymore.