Hello all, i NEED help!

Yesterday, I got the dreaded 'SELFLEVEL SUSP INACT' message. I've done lots of searching on here and I've checked all the fuses (all fine) and I also tried disconnecting the battery for 15 minutes but the message won't go away.

The suspension level is also all over the place. The rear is riding super high (equal both sides) and the front is slammed to the floor, the right hand corner being about an inch lower than the left.

The car is under warrranty, but I don't think it covers air suspension - only conventional type.

It's a 4.8is with just over 50K.

What should I do? What's the most likely issue?

Thanks in advance.

P.S. In the three months I've owned the car it's been in the garage four times! It's had all new bushes at the front, including ball joints, a new battery, gearbox re-programmed because it's jerky as hell sometimes... new brake servo (nearly ran someone over at a zebra crossing when it failed) and a couple of other bits too. It's the most unreliable car I've ever owned!