please stop debiting my account

may GOSIAME please revert with my query and the details of the credit controller.

fed health keeps debiting me on a plan that was cancelled over a year or 2 years ago . the money is for an unpaid Medi vault. the money was initially debited from my employer and when i cancelled i had no idea the funds were no longer deducted from my salary . i was surprised when Medi health started debiting my account for over R 2000. i want to make an arrangement and can this debit order be removed please.