Unauthorized / ********** debit orders

Two amounts were debited from my fathers account for years who is a pensioner, and my father did not give a consent for authorization. We were told they do not have information about the companies or people the amounts are debited to. I was surprised because I thought that they will have the information and paperwork/ contracts that were signed between the customer and the companies in order to authorize the debit orders. One debit order indicate the name Insurance Premium Guareqstradd which we tried to google without success, and the other company is Insurance premium agility, we tried to google Agility Insurance but unfortunately the contact details are not clear, most people have the same complaints as us with agility, they have not authourized the debit orders. My father is frustrated now because we are unable to track these people and demand for our money back. All I need is for standard bank to stop the debit orders and give us the contacts so that we can demand our money.