Well this is what they said:
We acknowledge receipt of your email with regard to your bet with reference number
xxxxxxxxxx.Upon checking with the proper department, ATP Wimbledon Open 2008 Winner(MEN) Early Market,
“all bets placed will be considered VOID due to Incorrect League Name. Correct league name should be (ATP-Wimbledon Men Winner)”. We regret to inform you that cancelled bets are being informed through our Announcement Page.
You may also refer to this information in our Announcement page. Simply login to your account, click on My Account and then choose Announcement.
Basically i assume they're saying the onus was on me to check the wager periodically to see if it was still valid - which i obviously didnt do
There's also no indication of when it was actually cancelled as far as i can tell in my history. I wonder how many bets on nadal they have CANCELLED? My guess i none.