I remember when I changed my SSIA from equitys into a cash fund with Irish Life. They had an aertell page displaying 'todays' prices and I made a decision based on this. It turned out these prices were a day and half old. I got RTE to email me the page frame and made an appeal to Irish Life, as the page was misleading. The agreed with me, apologised, and gave me the difference in price. (Simple Version)
I suggest you put your case together and put it to them in the same way.