just bring them back and explain it, if its a legit shop they'll redrill them and seal the holes for free + if you're lucky they'll throw in something extra ...
i drill almost all the skis in the shop i work at and k2 parkskis definitely need double checking to make sure they're in the right direction, those things have such hectic designs and symmetric shape that a mistake is quick to happen ...
personally i've only fucked up one pair of skis and those were my own, it was the first time working with a jig and i had it on backwards so i drilled them backwards, nothing too bad though, filled the holes up and drillled them correctly and now they're still going strong after 3 years.
so don't go in there like a screaming banshee, mistakes are human ;)