DOUBLE DEBIT AND NO REFUND

FNB Life have made payment on my covid loan in December 2020, the Debit order was then taken for the same amount on the 2nd January 2021, I have tried to contact FNB they are not helping I have lodged a complain on the 3rd January 2021 as I was advised by online chat that I needed to wait for the next day for them to be able to reverse the debit order. On the 3rd I contacted FNB online Chat and then was advised that I needed to email they are not able to assist me. No one is helping me and this is my Food money I am unemployed and need this to be reversed immediately.