Write to the Bus Company asking for an apology. They'll investigate who the driver is and probably reprimand and deal with him internally. I had to investigate loads of similar complaints and accidents when I worked for Stage Coach Devon. Often it will involve the driver being sent back to their driving school for reassessment. It could even leave to disciplinary action for the driver depending on previous history.
At the least you'll get an apology. Give them as much info as possible, bus number, reg, description of driver, location and time.
Tom Kp

