Discovery's un-authorized debits. Is this a **** or *****?

Over the past 3 months, Discovery has been making un-authorised from my bank account. I have called their call center & I was asked to send bank to prove the transactions to them. I have done that & nothing has changed as they are carrying on with the debits. The consultant that I was in contact with expressed that I do not have a cover with Discovery & that the premiums being debited were for someone else. My question to Discovery how does this happen? How can the incorrect banking details of your clients be captured without the proper checks being done, to ensure that the bank account belongs to that individual (your client)? I have asked & asked Discovery to get to the bottom of this, as it is an inconvenience to me & causes other debits to bounce & not get paid.

DISCOVERY WHAT DO I HAVE TO DO IN ORDER FOR YOU TO STOP DEBITING FROM MY ACCOUNT?!