You can see the total number of SIMs ordered by potential recruits and how many have been activated (excluding SIM swaps). Each new recruit (that activates and tops up their SIM at giffgaff.com) earns you 500 Payback points. Hurrah.
22 Mar 2016
So from here you will be able to see if any sims ahave been ordered it may just be a mistake and the email went out wrong.