Congratulations! I am glad it went well, even if it did mean all your careful preparation was unused. Also I think there is something pleasingly ironic about turning up for an HR type qualification and finding that HR have cocked up.

(I was complimented on my A-levels at an interview this year! Which was mostly weird, and a bit condescending as they called me - in a panel of three men - a 'clever girl', but hey. Appreciating lots of A-levels for the win!)