Forget about trying to replace the CV boots if they are torn, replace the axle with a VW reman unit. About $325 at a discounted price, you may be able to purchase them online for around this, but usually you can ask the dealer to discount the price and if the parts guys are decent they will.
But in the short term, just get the axle snapped back in, again, 15 minute job. If the face of the CV joint is more than about 1/4"-3/8" away from the transaxle housing it slipped out.
Rotate the axle to line the splines up and snap back in.
Labor rate @ $100, a 15 minute job should be $25, if they charged you $50, so be it. All you have to do is get under the car, check each side axle for how far it is out, the one that is out further is the problem side, line the splines up and push wiggle and put hard, axle should drop in about 1" after that and be close to the transaxle housing. I could do it in 2 minutes if the car was in the air high enough to get under it. Even Rhino ramps would be high enough to get the job done.
As for replacing the axle, it is about 1.5-2 hours, so probably closer to $200 labor.