help me everyone?

i bought some coilover lowering springs from ebay and kyb gr-2 series shocks too, what i come to realize that now whenever i hit a bump it feels like i just hit the ground from a jump, all it does it jump and keep bouncing like im off-road and it is un-drivable which really sucks cause im paying for a car that i cant drive and all i wanted to do was decrease the gap between the fender and my 17 inch tires what can i do to solve this problem...suggestion on buying or fixing?

look into some Tien coilovers, i think the starting price is like 800 or 900 for a full coilover setup. on the cheaper end just get some real lowering springs, or some ground control coilovers, and stay away from the cheesy coilovers.