Urgent refund

My account is currently under debt review but it is up to date. I mistakenly transferred R 1700 to the loan account as its on my FNB banking app menu .This money is urgently needed back as I need to pay traffic fines that are overdue and a warrant has been issued. I immediately called your call centre and was put on hold indefinitely for 20 minutes till I dropped and was assisted by a gentleman who told me to email ********** . I have not received a response from them and I sent all supporting documents. This amount was really paid in error and as I am under debt review money is an issue and I cannot afford to lose these funds. I hope someone can assist me as I honestly feel helpless