Been down to the club and they say that ticketmaster have already reimbursed those who were over-charged for their OAP Wembley tickets. It will go back on the card with which you paid for the tickets. It'll take a few days to show up, but it's been done. If it hasn't registered in your account by this time next week, contact the club.
That statement would take how long to put on the Offish site set that against having to explain to everyone individually that goes to the box office about this. Wasting folks time and expense in the process. Thanks for the info Jay.