Your claim is against the report company, not the end buyer.
Therefore, Unfortunately, you will have to pay to obtain the return of your vehicle and issue proceedings against the report company for any losses you have suffered.
I hope this answers your questions. If so, kindly rate the answer and provide feedback.
If you have any further questions, please do not hesitate to ask.
They should do have asked the person responsible for the debt who owned the items
You should contact the company providing evidence of the ownership. You should also ask them to compensate you for the costs incurred. If they fail to agree, you will have to litigate. You can do this online at www.moneyclaim.gov.uk.