Hi, almomen, welcome to the forum.
Are you sure the springs were for your specific model? If so then did you put the largest spring pads on them?
If you have the right springs and the largest pads, the only other thing you could do would be to install those crummy little spring compression/expansion inserts. I've no idea where you might find them in the ME, here the chain auto parts stores carry them. JC Whitney sells them here, I don't know if they do international, but the one type looks like this:
Last idea I'd have would be to have a ring cut off of your stock springs and then put those back in. Hope it works out for you.
Take care and enjoy the ride,
Greg