Exchange RUNEs , possible ?

I have just accidentally bought Rune of SP 7 - days (680 coins) rather than Rune of XP 7 days which is 1200 coins.

So the quick question is, can I exchange the Rune of SP for Rune of XP with more coins of course ? Or is there anyway to fix this issue ?

Thanks

No.

Miss-clicks are evil.