I got this epump 10c thing too. God knows if it actually works properly though.
I changed my card pin via the website ... all ok apparently. Turned up at the epump, swiped my card, entered my new PIN, PIN rejected .. oh.... Filled up anyway as I still had a few 4c/litre redemptions on the EDR card. Paid at the checkout, receipt says 4c/litre off so fair enough.
Got home, checked the website, it says I redeemed the 10c/litre + 4c/litre ... umm, no, not if you rejected my PIN you silly machine.
Rang EDR helpline, they suggested I try to change my PIN again via the website as their is no other way to do it - cant go to a bank branch and they can't help over the phone with it either. They are looking into why I apparently redeemed the 10c offer when the PIN was wrong ..
Its all very fancy this stuff, but really, they are overcomplicating simple purchases and are not (apparently) able to provide a consistent service with all this funky additional stuff they throw at us. The EDR CC is apparently a "Platinum" if you look at the printing on the card, but seriously WW/HSBC you're not kidding anyone with that ... its a grocery card with grocery service and functionality.
Don't get me wrong, its cheap and cheerful, the 16K free points offsets the 89$ fee to make it essentially free and the QFF direct sweep for everyday stuff will help out, but overall I'm going to try not to expect too much.