****ed off with FNB

I have asked FNB numerous times to change my debit order for the revolving loan to be taken off my capitec account as i had changed my salary to go into my capitec account, they requested a letter from my employer and a capitec bank statement, I sent both on the 22/07/2020, still to this date, they are trying to debit the fnb account which has no money , the account is now in arrears because the debit order bounces and they charge for it, whos now responsible to pay this account off, I even went into the bank to try to resolve this, they could not help me, Im so tired of FNB's useless service, Today I called in and spoke to five consultants who kept on putting me through to diffferent depts, how frustrating is that Can someone plsssss help me