Since there is probably not only one part broken but several Cs, power regulators and the PSoC itself, I am afraid that having that kit repared could be more expensive than the price of a new one ($99).
When it is a PSoC 5 kit you may get it replaced for free by a PSoC5LP kit, have a look here www.cypress.com/ , but this will only work if the kit has not been replaced yet.
Thank you, sir....we file a case on cypress and thats what they suggest as to our psoc5 haven't been replaced.
You might also just take a look at your power distribution on the board.
Both regulators can tolerate > 15 volts, and have thermal limiting to pro-
tect them. So it all depends on where you connected 15 V.