*****ulent processing of contracts

I’ve never interacted with these people yet today I received a mandate from my bank to approve a debit order. I have no idea where they get my details or who authorised the processing of the contract. They are committing ***** on peoples accounts and they need to be stopped. Yet no one seems unbothered with what they are doing when you call them, still waiting for an email from them as they promised. I need call recordings and the person that processed the application to confirm who gave them permission to use my details. I want that contract to be removed and all my details to be removed from their database with immediate effect. This is absurd.