Sanlam Personal Loans opens *****ulent applications and are harassing me

Sanlam Personal Loans opened a *****ulent applications in my name. They have sent an sms to indicate whether I want to complete the application or Opt out to cancel. I have cancelled. They are calling me every 15 minutes all day every day. They are making my life a living nightmare. When I block their numbers they flood my voicemail box because of the automated system. I have spoken to more than one consultant and asked them to remove my number from their system but they refuse unless if I provide my ID number. How can I provide my ID number if a *****ulent application has already been started. I spoke to a supervisor after making me hold for almost 30 minutes and asked her to remove my number. I gave her my name and my number and she promised to remove my numbers off their system. And not even ten minutes later, I get another call and the agent gives me the same story….that she cannot remove my details unless if I give my ID number. I don’t know what to do with these annoying people anymore I reverted to playing high pitch noises in their ears so they can realise what annoying is.