2001 pt cruiser shutdown aft. Motermounts installed

Car ran fine before these dudes changed these mounts. Any idea what could cause car to just shut off pulling out going less than 30 mph no impact or potholes. These guys used a floor jack no engine hoist. Changed three others and trannie mount in less time than to remove and install last mount. Thay removed serpinteen shroud,belt,and one pullie to get it out and in?????

Where'd they jack the engine up from, not the oil pan I hope. Obviously they need to correct whatever they did, not much anyone here can advice you on what to fix without knowing what they did. My guess the problem centers around the removal/reinstallation of the serpentine belt, affecting the charging system. It should also be checked they reconnected all grounds.