Steering Failed problems of the 2014 Tesla Model S

It's about 8:18 on Saturday, March 2nd, drizzle. I was driving from freeway 56 west to south highway 5. After merge to 5 freeway, I felt the tires slip, then the car suddenly unintended accelerated and steering wheel failed, car whirled at high speed bump into the left side of freeway guard wall, continued to be accelerated spin crossed four lanes hit on to the right guard wall, spin another half circle then stop on emergency lane. Luckily, no other car was involved, I was not hurt at all, except that the car could not drive. By that time the car show 'stability control disabled' see picture. Sitting in my car and calling Tesla report about the accident. They told me the reason was the weather. About ten minutes later, the police came and looked at the scene of the accident. As no other car was involved, no one was injured, no public equipment was damaged, the police did not issue tickets and reports.