Unauthorised debit order

Some ********* has set-up a debit order on my personal Absa bank account, WITHOUT my explicit authorisation, My explicit signature could be either my personal physical hand-written signature, electronic signature, retinal scan, voice signature, dna, etc.

And now I'm told this debit order can't be cancelled. Nor can any of the ********** payments that are older than 40 days be reversed?

How can banks be allowed to do this??? This breaks the very nature of banking contract between themselves and clients!!! Protection of bank accounts!!! How can a debit order be set-up without my explicit authorisation???!!! What processes are in place to prevent this??? Can any 3rd party impersonate anyone and place debit orders onto the impersonated individual's bank accounts??? This is ridiculous! Regardless of where the ********* obtained the banking information....how can a bank allow this to happen???

Set-up a debit order on a client's account without EXPLICIT authorisation directly from the client? That's just silly business. And a silly way of doing business.