Discovery Bank cannot do their jobs properly

I closed my account in August and up until now the end of September it still says my account is open. Now I dont receive my cash backs as it's all being sent to this closed account and when I call discovery they see it as active and when they transfer me to the bank then the bank says they see that I've closed it so they will log it as to why it's not closed properly. This is ongoing and just ridiculous that I have to battle this way