Hmmm... how low is the car?? I've never heard of a weak suspension spring and even if the car is lowered the tyres don't catch the guard with stock rims.
So, do you have aftermarket rims with the wrong offset? That would make the outside of the rim sit very far out, and touching the guard would depend on camber.
Are there spacers on the hubs behind the rim? Take off both wheels and make sure there are no spacers fitted, or more especially, one spacer left on the side that is rubbing. We've just had a case of that here, the tyre jocks left one spacer on when fitting new rims and that tyre rubbed the guard away.
http://forum.altezzaclub.org.au/index.p ... c=5303&hl=
Is the camber equal on both wheels? I've seen a lowered car with completely different camber of each rear wheel, and the one with little neg camber (almost upright wheel) rubbed. The one with -2.5deg was fine.
Do both wheels sit in the same place inside their mudguards? or has the car been drifted into a kerb and bent the suspension on one side??
If you bought it from a dealer take it straight back and complain until they fix it!
Oh- forgot about the lights! How is the adjustment?? I've never noticed the lights to be poor, although I suppose the clear plastic could go really really yellow and faded in time, but I'm sure Ireland doesn't get enough sunshine for that!!
Shine them on the garage wall and wind them up a bit.