Smelling fuel and smoke from engine

I recently had services done on my car for installing new engine mounts because my engine was sagging to the left and fuel system cleaning from Firestone. Two days later, I am smelling fuel inside of my car and my engine is starting to smoke when I drive. What should I do? What services do I need to stop this from happening again? Also, whenever I get gas, the pump is jerking meaning it wont receive the full amount without me pumping it a hundred times.