Electronic Stability Control Related Problems of the 2014 Hyundai Genesis

Electronic Stability Control problem

I got into an accident in October 2019 where I was rear ended and carried into another vehicle but my air bags did not deploy although my headrests did deploy but prior to the accident my car would fishtail when making turns when the roads were wet and while driving on the highway trying to merge into traffic my car loses acceleration all on its own and then gradually picks up speed again I've almost got hit several times because of this. Also my car has shut off on its own in traffic with heavy traffic it was very scary we didn't know what was happening to the car and this has happened twice. Now my car is showing a lot of hard code errors from the abs/esc system to power seat modules they say it's something wrong with the computer system itself because it doesn't notify you of any issues on the dashboard at all. And today I took it to a mechanic shop and multiple b codes showed up which didn't make any sense even cam sensor codes and I just got this car in March 2019.