Aer Lingus Refuse to process refund Internet

Due to the Iceland Volcano in late April, we decided to cancel our trip to England and Ireland because of the closed airspace where we were traveling.  All the companies that we had made reservations and prepayments with refunded our money no questions asked in a timely manner, including Priceline which has a strict "no refund" policy. 

Aer Lingus (AL) said they would refund our money for the two reservations we had with them.  After almost a month, they refunded the first.  However, two months later they still refuse to process our second booking.  I have called them repeatedly over the last two months and each time the customer no-service agent recites the same old company line that they have been swamped with refund requests and will get to it someday.  I asked to speak to a Supervisor and after holding ten minutes I was told a supervisor would call me in 48 hours.  Big surprise, no call. 

Each time I call their 800 number it is a minimum 20 minute wait to speak to someone that is of absolutely no help to me.