It can be intimidating, but we'll help when we have the info we need, but we're still somewhat short of this.
I never received any correspondence from the bailiff company, first i knew was when they turned up at my address.
Then you must find out when and to whom(exactly) this was sent.
and,
do you still have the vehicle concerned,
who was the registered keeper of the vehicle at the time and who is now, and
where is it?