hi, did someone tired to make rear suspention harder?

i'm carring quite a lot of weight in a boot and my polo looks like a plane about to take off.

been in few garages and they been saying that there is only one type of coil springs for them.

viariant one are stronger? maybe ibiza, etc?

need to find solution bcoz its looks realy funny.

thanks,

variant, ibiza and cordoba are the same..

d.