Acinonyx

Recently got some work done by the los angeles performance division thelapd.com a pretty reputable shop, They changed out my stock clutch with a spec Stage 3, my flywheel with a fidanza aluminum, and my gm hydraulics to the latest updated version on my 1998 camaro SS, I checked the parts myself before install.. anyways, it's been about 150 miles, and a couple of days.. now it's unbelievably hard to shift gears under throttle (not even WOT) just partial, and almost impossible to shift it into reverse even when fully stopped... I'm gonna give em a call first chance I get, but do any tranny gurus have a possible answer? What could be causing this? And btw this isn't the skip shift feature, just making that clear.
Perhaps they didn't refill the tranny fluid or grease up the shifter ball?

Thanks for your time