Frame And Members problems of the 2006 Lexus IS250

Lexus Is250. Drive shaft came off. I had an accident on inter-state 75/85 north bound in downtown atlanta around exit 248b. The front driver side wheel came off in the middle of highway. I did not hit any car except the broken tire hit concrete wall and stopped against concrete wall. I reported this issue to Toyota immediately but it took them 3 months to inspect the car. Since I can not afford to let it sat in collision center for a while, I had to repaired. By the time, they inspected on Nov. 25, 2009. It got all repaired. I did show picture to them. However, Lexus refuse to offer any assistance after inspection. Lexus said that I could hit something that it's why my rim was damaged. Of course, my rim was damaged because it hit concrete wall after it came off. Those pictures showed that I did not hit any where (including front bumper). Atlanta police came immediately since this accidents was on interstate. However, according to him that I don;t need to file report because there is no other party or property damage. It was only my car. I went to hospital for neck check out. X ray did show something unusual but my own insurance covered the charge. Please review and see if any related incident to prevent future issue.