I guarantee you, this issue will return after 5K kms. I have done 68K kms on my punto, the disks were changed on my expenses once and Warranty twice, wheel hubs were changed under warranty. The issue disappears for a few thousand kms and reappears each time. Im thinking the problem might be with the calipers or may be bent alloys. My alloys were slighty bent and they were fixed but im not sure if they are fixed perfectly. Im not sure about what the symptoms on your car are, but my steering wobbles only when slightly tapping the brake to slow down, if the brakes are fully applied, there is no wobble. There is one more thread discussing this issue.