Judy I had a driveway poured this past Jan. and it began cracking in less than three months. Where I live the contractors have a mind set that all concrete will crack. I had a long post on this further down and had to threaten a law suit before finally getting their attention. They are in process now of repairing. You may have waited to long to get any action but it is worth a try. Lots of luck. Wish I could be of more help but it all depends on how good they prepared the base. If you can prove anything about that or the concrete mix you might have a better chance.