Fedhealth medical aid terrible service

I hope someone in fedhealth management reads this and responds My mum was admitted in hospital in durban on 29 March the doctor on shift attended and she was admitted around 10pm. My mum passed away next morning 2am. . I mailed fedhealth to cancel my mums medical aid i got email confirmation of same. I wasn't aware that I am billed in arrears so I contacted my bank to reverse the debit. I was advised to pay it back so I did and mailed proof. Prior to this I got membership cancelation mail from fedhealth. I just got sms that my account was debited again. I tried Contacting a agent via the online chat only to be told that the executor of estate can make enquiries. My account can be debited but an executor can make enquiries... really. Mailed customer services but no response. I can't believe how difficult it is to get someone to resolve this. I basically paid double this month on top of additional funeral expenses.