Welcome to the Forum!
Before any more mistakes are made, I suggest you run a couple of searches on two subjects:
1. 2.5" lift kits and their benefits
2. Pro Comp products particularly coil reviews
4" is a tall lift on a Jeep that will lead to other modifications. PC is a budget lift and not the best choice for a tall lift. What you save initial, you spend in excess in the long run.
The stock coils with spacers, albeit some tall ones, are much better choice than the alternative you are considering. It may have been a "Bait and Switch" but in this case, they did you a favor.