Small spare tyre ok

LAST year we bought a VZ Commodore Lumina which has 17-inch alloy wheels and a 15-inch steel spare. The dealer told us the spare was for temporary use only while the other was being repaired or replaced. What concerns us is the damage likely to be caused to the suspension while doing this. We have since replaced both the wheel and tyre at a cost of $597. I think Holden should reimburse this cost. What do you think?