Replaced the A/C compressor and the new belt does not Fit?

It sounds like they gave you the wrong A/Ccompressor, possibly the one for the V-6 and not the 4 cylinder you have. The pulley size should be the same for the original and the replacement and they are different between the two engines. I would look at the part number on the unit you received and see what comes up if you search that part number. The reason you need the correct one is because the pulley size determines how fast the unit spins, the larger pulley will spin slower and that could cause problems with the electrical system and set codes because the output isn't correct. The correct Ford part number is - 8S4Z10346A for that vehicle.