Unauthorized debit order

I took a retirement annuity with Hollard and they said they'll start debiting February 2020 all of a sudden I get a debit order of R400.00 on my account on the 2nd of January 2020 not even on my payday!! What nonsense is this? I don't deal with shady transactions, I'm reversing this thing and canceling this thing. Thank you for showing me your true colors this early!!