Benefits on hold due to Discovery debit order error

I pay our medical aid contributions on two separate debit orders, for myself and my wife. Last month the debit order for my wife's account no *** did not go through, so I paid it via eft and it was reactivated on 29 June 2021. Despite having paid the contribution, Discovery debited the amount together with the current contribution. This was done without prior notice to me, causing my account to have insufficient funds for my own medical aid debit order. They are now sitting with an extra premium claimed on my wife's account, while my account is in arrears. I was informed that my benefits have been suspended with no mention of a refund for extra contribution deducted. Also had to pay my bank R115 for insufficient funds due to their inefficiency.