Continued debiting of my account by Discovery medical aid after ending account

For the second month in a row I have been debited large amounts of money from my account that should have been stopped when I changed my Discovery Medical aid from my ex wifes to my own personal one.

I was the account holder from which debit orders came off and am now a main member on my own.

Yet for the SECOND month the amount I sued to pay (For the whole family) has been taken off my account even AFTER my brother changed my membership!!!

Not cool. I now can not pay my rent as there is not enough money!!!!

Get this sorted out pls.