Shocking FNB Service

Reference No. *** - R3638.16 was deducted **********ly from my credit card. I am supposed to receive 'approve' or 'not approve' every online transaction. I was never informed of this transaction. I reported it to the ***** Department immediately and they cancelled my credit card. Since then I've sent no less than 100 'private chats' to the bank asking/pleading for updates. They keep saying 'it is too soon'. It's been a whole week. I don't have replacement card yet and now the company who made the transaction in California are '*********ing' me with email messages. How they have got my home address, email address and banking details is a total mystery. They didn't come from me. And why tell your customers to use the 'private chats' on your banking app when you just get ignored in beyond me. We are two old age pensioners and this is just way too much stress for us. We want answers - where did these people in California get all my personal details? That is worrying in the extreme. As I have had NO help from FNB themselves, I am now on bended knees hoping someone in authority will reverse this amount and let me continue with my life. I did not buy anything from California for R3638.16. Please reverse. It is *****.