FNB doesn't know where I live

At the beginning of this year, my FNB cheque card expired. No replacement had arrived at the time of the card expiring. On enquiry with FNB I was told that the card had been sent to a branch in Pretoria. I live in Durban. I have lived in Durban for the last six years. In this time I’ve opened new FNB accounts, in Durban, I’ve financed a new car, in Durban. All of these require a proof of address, in Durban. 99% of my card transactions are in Durban, but, nope FNB insists that according to them I’m in Pretoria, and now so is my card. FNB want to charge me a fee to correct their mistake and send my card to Durban, where I live. My workaround to this problem was to load an FNB virtual card onto my phone, only now FNB has decided that this card will work for only one transaction per day! Tell me why I should keep my business with you FNB, because I’m all out of reasons?